Upcoming Events

09 Nov 2025;
01:00PM - 05:00PM
November Meeting featuring Paul Zammit presenting Inspirations and lessons I have learned
14 Dec 2025;
01:00PM - 05:00PM
December meeting with Garry Edwards presenting Meadow View Gardens - The Story

What's New!

Plant of the Month

Toronto Botanical Garden

Our in-person meetings are held at the TBG.

Germination Guide Instructions

Find the plant you are searching for by using the search box. Select the target to the right of the plant name to see full germination details. Click on the name to open a Google search of the plant.

Download a copy of our codes.

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ORGHPS's Germination Guide
Plant Name Full
Info		 Viable Germ
Code		 More
Info		 Special
Info
Abelmoschus manihot K
Abies koreana 'Silberlocke' J 7
Abronia nana A 6 7
Acacia podalyriifolia A 6 7
Acacia species A 6 7
Acacia williamsonii A 6 7 *
Acaena adscendens A
Acaena buchananii E
Acaena caesiglauca E
Acaena glaucophylla K *
Acaena hieronymi A
Acaena magellanica E
Acaena microphylla E
Acaena microphylla 'Kupferteppich' E
Acaena myriophylla A
Acaena novae-zelandiae E
Acaena pinnatifida E
Acaena saccaticupula E 2 7
Acaena saccaticupula 'Blue Haze' E 2 7
Acaena sericea A
Acaena williamsonii E
Acantholimon all species B *
Acantholimon araxanum A *
Acantholimon armenum A *
Acantholimon avenaceum A
Acantholimon bracteatum A *
Acantholimon bracteatum var. capitatum A *
Acantholimon caryophyllaceum A *
Acantholimon compactum ! B *
Acantholimon glumaceum A *
Acantholimon hohenackeri ! B *
Acantholimon karelinii A *
Acantholimon litvinovii L
Acantholimon reflexifolium A *
Acantholimon saxifragiforme A *
Acantholimon sp. ! B *
Acantholimon ulicinum ! ? *
Acanthopanax sessiliflorus *
Acanthopanax sessiliflorus var. parviceps *
Acanthus hungaricus E 7
Acanthus mollis F 7
Acanthus mollis Latifolius Group F 7
Acanthus spinosus F 7
Acer amurensis H 7
Acer argutum L 7
Acer barbinerve G
Acer cappadocicum ssp. divergens J
Acer carpinifolium H 7
Acer caudatum ! G 7
Acer caudatum subsp. ukurunduense ! G 7
Acer davidii L
Acer ginnala G 7
Acer glabrum H 7
Acer glabrum var. douglasii H 7
Acer griseum G 6 7 *
Acer grosseri var. hersii G
Acer japonicum G *
Acer japonicum 'Aconitifolium' L
Acer japonicum f. 'Aconitifolium' L
Acer japonicum var. dissectum G *
Acer mandshuricum G 3 6 7 *
Acer palmatum G
Acer palmatum 'Dissectum' G
Acer palmatum 'Dissectum Viridis' G
Acer palmatum 'Emperor I' G
Acer palmatum 'Koto Ito' G
Acer palmatum 'Linearilobum' G
Acer palmatum 'Osakazuki' G
Acer palmatum 'Red Pygmy' G
Acer palmatum 'Shigi-tatsu-sawa' G
Acer palmatum 'Yasemin' G 7
Acer palmatum f. scolopendrifolium G 7
Acer palmatum var. dissectum (Dissectum Atropurpureum Group) G
Acer pensylvanicum L *
Acer pictum subsp. mono ! G 7
Acer pseudosieboldianum A 3 *
Acer saccharum subsp. nigrum G 7
Acer sieboldianum ! L *
Acer spicatum ! L 7
Acer tataricum 'Hot Wings' L 7
Acer tataricum subsp. ginnala L 7
Acer tegmentosum F *
Acer tetramerum ! L *
Acer triflorum D 7
Acer truncatum G 7
Acer tschonoskii subsp. koreanum ! G 7
Acer ukurunduense L 7
Achillea ageratifolia B 3
Achillea ageratifolia spp. aizoon B 3
Achillea ageratum A 3 *
Achillea alpina A
Achillea Anthea' A 3
Achillea asiatica B 3
Achillea biserrata A
Achillea clavennae K
Achillea clavennae var. intercedens K
Achillea filipendulina A 3
Achillea filipendulina 'Gold Plate' A 3
Achillea filipendulina 'Parker's Variety' A 3
Achillea grandiflora A 3
Achillea holosericea A
Achillea huteri A
Achillea macrophylla A 3 4
Achillea millefolium A 3
Achillea millefolium 'Cassis' A
Achillea millefolium 'Summer Pastels' A 3
Achillea Moonshine' A 3
Achillea Moonwalker' A 3 *
Achillea nana B
Achillea nobilis subsp. neilreichii A 3
Achillea ptarmica A 3
Achillea ptarmica subsp. pyrenaica A 3
Achillea ptarmicifolia A 3
Achillea pyrenaica A 3
Achillea Schwellenburg' A 3
Achillea sibirica A 3
Achillea sibirica 'Stephanie Cohen' A 3
Achillea sibirica ssp. camtschatica 'Love Parade' A 3
Achillea sibirica subsp. camtschatica A 3
Achillea sp. ?
Achillea Summer Pastels Group A 3
Achillea tomentosa A
Achillea tomentosa 'Aurea' A
Achillea umbellata A 1
Achillea x kellereri B 3
Achillea x lewisii 'King Edward' A 3
Achlys japonica L
Achnatherum calamagrostis A
Achnatherum extremiorientale A
Acidanthera bicolor K
Acidanthera sp. ?
Acinos alpinus A 3
Acis autumnalis A
Acis nicaeensis A
Acmella oleracea A
Aconitum alboviolaceum ! 4 *
Aconitum all species ! *
Aconitum altaicum ! K 3 *
Aconitum anthora ! *
Aconitum baicalense ! *
Aconitum bakeri ! *
Aconitum barbatum ! *
Aconitum barbatum ! *
Aconitum Bressingham Spire' ! *
Aconitum carmichaelii ! J *
Aconitum carmichaelii 'Arendsii' (Arendsii Group) ! J *
Aconitum columbianum ! *
Aconitum cymbulatum ! 4 *
Aconitum czekanovskyi ! *
Aconitum excelsum ! *
Aconitum ferox ! D *
Aconitum firmum ! *
Aconitum fischeri ! *
Aconitum gmelinii ! *
Aconitum hemsleyanum ! *
Aconitum hemsleyanum 'Red Wine' ! *
Aconitum heterophyllum ! J 2 4 7 *
Aconitum Ivorine' ! *
Aconitum jaluense ! *
Aconitum japonicum ! L *
Aconitum japonicum ! *
Aconitum kirinense ! *
Aconitum kitadakense ! *
Aconitum krylovii ! 4 *
Aconitum kusnezoffii ! 4 *
Aconitum lamarckii ! *
Aconitum lasiostomum ! *
Aconitum lycoctonum ! *
Aconitum lycoctonum ssp moldavicum ! *
Aconitum lycoctonum subsp. lycoctonum ! *
Aconitum lycoctonum subsp. neapolitanum ! *
Aconitum lycoctonum subsp. vulparia ! *
Aconitum moldavicum ! L *
Aconitum napellus ! *
Aconitum napellus 'Album' ! *
Aconitum napellus 'Schneewittchen' ! *
Aconitum napellus ssp grignae ! *
Aconitum nemorum ! *
Aconitum orientale ! L 4 *
Aconitum sachalinense ! J *
Aconitum sachalinense subsp. yezoense ! J *
Aconitum septentrionale ! *
Aconitum sinomontanum ! H *
Aconitum sp. ! *
Aconitum Stainless Steel' ! *
Aconitum tauricum ! *
Aconitum uncinatum ! *
Aconitum variegatum ! E *
Aconitum volubile ! J *
Aconitum vulparia ! *
Aconitum x cammarum 'Pink Sensation' ! *
Acorus calamus *
Actaea alba ! E 8 *
Actaea alba f. rubrocarpa ! E 8 *
Actaea all species *
Actaea americana E
Actaea asiatica L *
Actaea cimicifuga ! C
Actaea dahurica D 8 *
Actaea erythrocarpa E 8 *
Actaea europaea ! C
Actaea foetida ! C
Actaea japonica C
Actaea pachypoda ! H 8 *
Actaea pachypoda 'Misty Blue' ! H 8 *
Actaea pachypoda f. rubrocarpa ! H 8 *
Actaea podocarpa L *
Actaea racemosa ! C
Actaea rubifolia C *
Actaea rubra ! H 8 *
Actaea rubra f. neglecta ! H 8 *
Actaea simplex ! E
Actaea simplex 'Black Negligee' (Atropurpurea Group) ! E
Actaea simplex 'Brunette' C *
Actaea simplex 'Hillside Black Beauty' C *
Actaea simplex 'Variegata' ! E
Actaea sp. ! J *
Actaea spicata ! C 8 *
Actaea spicata var. alba ! C 8 *
Actinea herbacea A
Actinidia kolomikta G *
Adelocaryum anchusoides A
Adelocaryum coelestinum A 3
Adenophora bulleyana A
Adenophora confusa F
Adenophora himalayana F
Adenophora hoffmannii ?
Adenophora kurilensis A 3
Adenophora liliifolia A 3
Adenophora nikoensis F
Adenophora remotiflora K 3 *
Adenophora sp. F
Adenophora stricta subsp. confusa F
Adenophora tashiroi J
Adenophora triphylla F
Adenophora triphylla var. japonica F
Adenophora verticillata F
Adenostyles leucophylla A
Adiantum pedatum A *
Adlumia asiatica ? 3
Adlumia fungosa A 3
Adonis aestivalis ! A *
Adonis all species ! *
Adonis amurensis ! L *
Adonis amurensis 'Genshu Fukujuso' ! L *
Adonis amurensis var. pseudoamurensis ! L *
Adonis apennina ! A *
Adonis cyllenea ! A *
Adonis Fukujukai' ! L *
Adonis pseudoamurensis ! L *
Adonis pyrenaica ! L *
Adonis ramosa ! L *
Adonis sibirica ! A *
Adonis species ! L *
Adonis vernalis ! L *
Aesculus glabra ! G *
Aesculus parviflora ! L
Aesculus pavia ! A *
Aethionema armenum A
Aethionema armenum 'Mavis Holmes' A
Aethionema cordifolium A
Aethionema diastrophis A
Aethionema glaucescens A
Aethionema glaucinum A
Aethionema grandiflorum A
Aethionema iberideum A
Aethionema most species A
Aethionema oppositifolium G
Aethionema saxatile K
Aethionema schistosum A
Aethionema sp. A
Aethionema speciosum L
Aethionema subulatum F
Aethionema Warley Rose' A
Aethionema x warleyense A
Agalinus sp. K
Agapanthus 'Baby Blue' A *
Agapanthus 'Blue Danube' A *
Agapanthus 'Dazzler' A *
Agapanthus 'Streamline' A *
Agapanthus 'Twister' A *
Agapanthus 'White Heaven' A *
Agapanthus 'White Swan' A *
Agapanthus Blue Triumphator' A *
Agapanthus Donau' A *
Agapanthus Headborne hybrid ! A *
Agapanthus hybrid A *
Agapanthus Northern Star' A *
Agapanthus Peter Pan' A *
Agapanthus praecox A *
Agapanthus Queen Anne' A *
Agapanthus Rotterdam' A *
Agapanthus Septemberhemel' A *
Agapanthus Silver Moon' A *
Agapanthus sp. A *
Agastache 'Astell Indigo' A
Agastache 'Blue Fortune' A
Agastache 'Bronze Foliage' A
Agastache all species *
Agastache aurantiaca 'Apricot Sprite' A
Agastache cana A
Agastache cana 'Sonoran Sunset' A
Agastache foeniculum A 3
Agastache foeniculum 'Alba' A
Agastache foeniculum 'Aureum' A
Agastache foeniculum 'Blue Fountain' A 3
Agastache foeniculum 'Golden Jubilee' K 3
Agastache hybrid A
Agastache mexicana A
Agastache mexicana 'Rosea' A
Agastache Morello' A
Agastache neomexicana A
Agastache nepetoides A 3
Agastache pallidiflora subsp. neomexicana A
Agastache pink Pop' A
Agastache pringlei A
Agastache rugosa K
Agastache rugosa 'Golden Jubilee' K 3
Agastache rugosa 'Liquorice Blue' A
Agastache rugosa f. albiflora A
Agastache rupestris A 3
Agastache rupestris 'Apache Sunset' A 3
Agastache scrophulariifolia A 3
Agastache sp. A *
Agastache urticifolia A
Agastache wrightii A
Agave parryi A 3
Ageratina altissima G
Ageratina altissima 'Chocolate' G
Ageratina occidentalis A
Ageratum houstonianum A
Ageratum houstonianum 'Leilani Blue' A
Ageratum hybrid A
Ageratum sp. A
Agrimonia eupatoria B
Agrostemma githago K
Agrostemma githago 'Ocean Pearl' K
Agrostemma sp. K
Agrostis nebulosa A *
Aguilegia vulgaris 'Winky Blue' A
Ajania tibetica K
Ajuga pyramidalis A
Akebia quinata G
Albizia julibrissin A 6 7
Albizia julibrissin 'Summer Chocolate' A 6 7
Albizia julibrissin var. rosea A 6 7
Albuca humilis A 2
Albuca nelsonii ! A
Albuca shawii A 3
Albuca sp. ! ? *
Albuca tenuifolia A 3
Alcea all species B 2
Alcea apterocarpa A
Alcea East Coast Hybrid B 2
Alcea ficifolia A 2
Alcea froloviana A 6
Alcea hohenackeri A 6
Alcea kardiya K
Alcea pallida B
Alcea rosea A 3
Alcea rosea 'Black Watchman' B 2
Alcea rosea 'Blacknight' (Spotlight Series) B 2
Alcea rosea 'Fiesta Time' B 2
Alcea rosea 'Halo Cerise' A
Alcea rosea 'Mars Magic' A
Alcea rosea 'Nigra ' B 2
Alcea rosea 'Queeny Purple' B 2
Alcea rosea 'The Watchman' B 2
Alcea rosea Chater's Double Group B 2
Alcea rosea East Coast Hybrid A 4
Alcea rosea ssp. ficifolia B 2
Alcea rugosa A
Alcea sp. B 2
Alchemilla alpigena A 3 *
Alchemilla alpina ? *
Alchemilla erythropoda B
Alchemilla faeroensis var. pumila J
Alchemilla glaucescens A
Alchemilla glaucescens subsp. pubescens A
Alchemilla hoppeana A 3 *
Alchemilla hybrida A
Alchemilla mollis A 3
Alchemilla monticola K 3 *
Alchemilla most species *
Alchemilla plicatula A 3
Alchemilla pratensis K 3 *
Alchemilla sp. ?
Alchemilla velebitica A 3 *
Alchemilla visianii A 3 *
Alchemilla vulgaris A 3 *
Alfredia cernua A
Aliciella haydenii L
Aliciella subnuda L
Alisma plantago ! B *
Alisma plantago-aquatica ! B *
Alisma subcordatum L 6 7 *
Alisma triviale ! B *
Allium 'Hair' G
Allium acuminatum J
Allium aflatunense E
Allium akaka A
Allium alataviense L
Allium all species *
Allium altaicum A
Allium altissimum K
Allium amabile J
Allium ampeloprasum A
Allium amphibolum A
Allium angulosum J
Allium atropurpureum J
Allium azureum A
Allium backhousianum L
Allium baissunense ?
Allium caeruleum A
Allium cardiostemon 'Purple Gem' ?
Allium carinatum F
Allium carinatum subsp. pulchellum F
Allium carinatum subsp. pulchellum f. album F
Allium carolinianum A
Allium cernuum A
Allium cernuum 'Graton' A
Allium cernuum 'Leo' A
Allium cernuum f. alba A
Allium cernuum var. obtusum A
Allium chrysanthum L
Allium cristophii J
Allium cyaneum F
Allium cyathophorum J
Allium cyathophorum var. farreri J
Allium falcifolium A
Allium farreri J
Allium fistulosum A
Allium flavum A
Allium flavum 'Blue Leaf' J
Allium flavum 'Minor' J
Allium flavum subsp. tauricum J
Allium flavum var. minus J
Allium forrestii G
Allium geyeri A 2
Allium giganteum G
Allium Globemaster' J
Allium gooddingii A 2
Allium grayi A
Allium gultschense J
Allium gunibicum L
Allium hirtifolium G 6 *
Allium hollandicum G 6 *
Allium hollandicum 'Purple Sensation' G 6 *
Allium hyalinum J
Allium hybrid ?
Allium hymenorhizum ?
Allium insubricum J
Allium jajlae ?
Allium jesdianum E
Allium kansuense A
Allium karataviense ! H *
Allium karataviense 'Ivory Queen' ! H *
Allium karataviense 'Red Giant' ! H *
Allium karataviense subsp. henrikii ! H *
Allium kokanicum A
Allium komarovianum A
Allium komarowii F
Allium lusitanicum L
Allium luteolum J
Allium luteum A
Allium mairei var. amabile A
Allium Mars' B
Allium Millenium' L
Allium moly H *
Allium Mount Everest' J
Allium murrayanum J
Allium narcissiflorum A
Allium neapolitanum ! J
Allium nevskianum J
Allium nigrum E
Allium nutans A
Allium nutans x senescens A
Allium obliquum A
Allium ochotense A
Allium ochroleucum J
Allium oreophilum J
Allium oschaninii A
Allium ostrowskianum J
Allium paczoskianum A
Allium paniculatum F
Allium perdulce J
Allium prostratum G
Allium pseudojaponicum ?
Allium pskemense J
Allium pulchellum F
Allium purpureum G
Allium ramosum A *
Allium rosenbachianum J
Allium roseum J
Allium roseum 'Album' K
Allium rotundum A
Allium rotundum subsp. jajlae J
Allium sacculiferum A
Allium sarawschanicum ?
Allium saxatile J
Allium schoenoprasum A
Allium schoenoprasum 'Bode Pastel' A
Allium schoenoprasum 'Curly Mauves' A
Allium schoenoprasum 'Forescate' A
Allium schoenoprasum f. albiflorum A
Allium schubertii A
Allium senescens G
Allium senescens 'Blue Eddy' G
Allium senescens subsp. glaucum G
Allium senescens subsp. montanum G
Allium senescens subsp. senescens G
Allium senescens x nutans A
Allium serawschanicum L
Allium Setlife' J
Allium sewerzowii F
Allium siculum B
Allium sikkimense A
Allium Silver Spring' A
Allium siskiyouense F
Allium sp. J
Allium sphaerocephalum G
Allium splendens A
Allium stellatum A
Allium stellerianum A
Allium stipitatum G 6 *
Allium stipitatum 'Mount Everest' F
Allium strictum J
Allium Summer Beauty' G
Allium Summer Pink' J
Allium suworowii F 3 *
Allium sylvestris J
Allium szovitsii L
Allium tanguticum A
Allium textile J
Allium thunbergii J
Allium thunbergii 'Ozawa ' J
Allium togashii J
Allium tricoccum ! E
Allium tripedale J
Allium tschimganicum ?
Allium tuberosum A
Allium uliginosum A
Allium unifolium J
Allium ursinum ! J
Allium victorialis ! A
Allium victorialis var. platyphyllum ! A
Allium vineale G
Allium zebdanense J
Alnus japonica A 3
Aloe marlothii A 3
Aloinopsis spathulata A
Alonsoa linearis A
Alstroemeria all species C 7 *
Alstroemeria aurantiaca C 7 *
Alstroemeria aurea C 7 *
Alstroemeria aurea 'Lutea' C 7 *
Alstroemeria Dr. Salter's Hybrids' J *
Alstroemeria hybrids C 2 7 *
Alstroemeria ligtu hybrids C 2 7 *
Alstroemeria lutea A 7
Alstroemeria presliana subsp. australis ?
Alstroemeria psittacina C 7 *
Alstroemeria sp. C 7 *
Alternanthera ficoidea A
Althaea armeniaca A
Althaea officinalis A
Althaea rosea A
Althaea rugosa B 2
Althaea taurinensis A
Alyssoides all species A
Alyssoides graeca B
Alyssoides utriculata B
Alyssum alyssoides A
Alyssum arcticum A
Alyssum argenteum A
Alyssum bertolonii subsp. bertolonii A
Alyssum caespitosum A 3
Alyssum cuneifolium B
Alyssum dagestanicum A 3
Alyssum fischerianum A 3
Alyssum Gold Crest' A
Alyssum handelii A 3
Alyssum idaeum A 3
Alyssum lenense A 3
Alyssum macrocarpum A
Alyssum markgrafii A 3
Alyssum montanum A
Alyssum most species A
Alyssum ovirense A
Alyssum oxycarpum A
Alyssum propinquum A
Alyssum pulvinare J
Alyssum saxatilis A
Alyssum serpyllifolium A
Alyssum sp. A
Alyssum spinosum A 3
Alyssum spinosum 'Roseum' A 3
Alyssum stribrnyi A
Alyssum wulfenianum A
Amaranthus caudatus A
Amaranthus cruentus A *
Amaranthus cruentus ?Velvet Curtains? A *
Amaranthus hybrid A *
Amaranthus hybridus A *
Amaranthus hypochondriacus A *
Amaranthus sp. A *
Amaryllis sp. A *
Amberboa muricata A
Amelanchier canadensis *
Amianthium muscitoxicum C
Ammi majus A 2
Ammi visnaga A
Ammi visnaga 'Green Mist' A
Amorpha canescens A 6 7
Amorpha nana G 6
Amorphophallus titanum ! A *
Ampelodesmos mauritanicus A 3
Ampelopsis brevipedunculata G 8
Ampelopsis brevipedunculata 'Variegata' G 8
Ampelopsis brevipedunculata var. maximowiczii G 8
Ampelopsis glandulosa var. brevipedunculata G 8
Amphicarpaea bracteata A 7
Amphicarpaea bracteata v. comosa A 7
Amsonia ciliata 'Halfway to Arkansas' L 7
Amsonia ellipsoides G
Amsonia elliptica C
Amsonia hubrichtii J
Amsonia illustris F
Amsonia jonesii A 3
Amsonia ludoviciana F
Amsonia orientalis G
Amsonia sp. F
Amsonia tabernaemontana G
Amsonia tabernaemontana 'Blue Ice' G
Amsonia tabernaemontana 'Montana' G
Amsonia tabernaemontana var. salicifolia G
Anacampseros densifolia A
Anacyclus depressus A
Anacyclus pyrethrum A
Anacyclus pyrethrum var. depressus A
Anacyclus pyrethrum var. depressus 'Garden Gnome' A
Anagallis all species *
Anagallis linifolia A
Anagallis monelli A
Anagallis monelli 'Skylover' A
Anagallis monelli subsp. linifolia A
Anaphalis alpicola A
Anaphalis lactea A
Anaphalis margaritacea A
Anaphalis triplinervis A
Anchusa angustifolia A 2
Anchusa azurea A
Anchusa azurea 'Dropmore' A
Anchusa azurea 'Feltham Pride' A
Anchusa capensis A
Anchusa leptophylla A
Anchusa leptophylla subsp. incana A
Anchusa officinalis A 2
Anchusa officinalis 'Angustifolia' A 2
Anchusa sp. A
Andromeda glaucophylla E
Andromeda polifolia K *
Andropogon gerardii A
Andropogon scoparius A
Andropogon ternarius A
Androsace adfinis E 3
Androsace adfinis ssp. brigitanica E 3
Androsace alba A
Androsace albana F
Androsace alpina A *
Androsace amurensis A 3
Androsace armeniaca var. macrantha A
Androsace barbulata A
Androsace brigantiaca E 3
Androsace carnea E 3
Androsace carnea 'Alba' F
Androsace carnea cross E 3
Androsace carnea mix E 3
Androsace carnea subsp. brigantiaca E 3
Androsace carnea subsp. laggeri E 3
Androsace carnea subsp. rosea E 3
Androsace carnea x pyrenaica E 3
Androsace chaixii H 3
Androsace chamaejasme A
Androsace ciliata G
Androsace coccinea F
Androsace cylindrica subsp. hirtella J
Androsace darvasica B
Androsace fedtschenkoi J
Androsace filiformis G
Androsace hausmannii ! L
Androsace hedreantha L
Androsace hirtella J
Androsace incana ! A
Androsace lactea H *
Androsace lactiflora A 3
Androsace laevigata L
Androsace lanuginosa E
Androsace mairei E 3
Androsace mathildae F
Androsace maxima A
Androsace Millstream' E 3
Androsace montana ! L
Androsace muscoidea A *
Androsace obtusifolia F
Androsace primuloides G
Androsace pyrenaica F
Androsace rotundifolia A
Androsace salicifolia A 3
Androsace sarmentosa G
Androsace sarmentosa ssp. primuloides G
Androsace sarmentosa subsp.primuloides G
Androsace sempervivoides A 3 *
Androsace septentrionalis A
Androsace septentrionalis ?Star Dust? A
Androsace sericea G
Androsace sp. L
Androsace spinulifera ! A
Androsace strigillosa K
Androsace studiosorum G
Androsace studiosorum 'Salmon's Variety' G
Androsace umbellata A 5
Androsace vandellii A
Androsace villosa A
Androsace villosa subsp. koso-poljanskii A
Androsace villosa var. arachnoidea G
Androsace x pedemontana J
Andryala agardhii A
Andryala integrifolia A
Andryala lanata A
Anemonastrum biarmiense ! A
Anemone alpina ! A
Anemone pulsatilla 'Pearl Bells' ! A
Anemone aconitifolia ! G
Anemone alpina ! A
Anemone alpina ssp apiifolia ! A
Anemone altaica ! A
Anemone baicalensis ! A
Anemone baldensis ! A
Anemone barbulata A
Anemone biarmiensis ! A
Anemone blanda A
Anemone canadensis ! E
Anemone caroliniana A
Anemone coronaria ! K
Anemone coronaria 'The Bride' ! A
Anemone crinita ! A *
Anemone cylindrica ! A
Anemone demissa ! A
Anemone dichotoma ! ? *
Anemone drummondii ! A
Anemone drummondii var. lithophila ! A
Anemone fasciculata ! L
Anemone flavescens ! A
Anemone globosa ! A
Anemone Guernica' ! A 2
Anemone halleri ! A
Anemone helvetica ! A
Anemone hortensis A
Anemone hupehensis ! B
Anemone hupehensis var. japonica 'Pamina' ! B
Anemone lesseri ! A 3
Anemone leveillei ! J
Anemone lithophila ! L
Anemone lithophilia ! J
Anemone lutea ! D *
Anemone magellanica ! A
Anemone multifida ! A
Anemone multifida 'Annabella Deep Rose' (Annabella Series) ! A
Anemone multifida 'Major' ! A
Anemone multifida 'Rubra' ! A
Anemone multifida var. globosa ! A
Anemone narcissiflora ! A
Anemone narcissiflora subsp. biarmiensis ! A
Anemone narcissiflora subsp. fasciculata ! A
Anemone nemorosa ! E *
Anemone obtusiloba ! A *
Anemone occidentalis ! A
Anemone palmata ! A
Anemone parviflora ! A
Anemone patens ! J
Anemone patens var. wolfgangiana ! J
Anemone pavonina ! A
Anemone pseudoaltaica ! A
Anemone pulsatilla ! A 9
Anemone pulsatilla 'Papageno' A
Anemone pulsatilla 'Rote Glocke' ! A 9
Anemone ranunculoides ! D *
Anemone riparia ! G
Anemone rivularis ! J
Anemone rivularis var. flore-minore ! A
Anemone rupicola ! A
Anemone slavica ! A
Anemone sp. ! A
Anemone sylvestris ! A
Anemone sylvestris 'Grandiflora' ! A
Anemone transsilvanica ! L
Anemone trifolia ! A *
Anemone trullifolia ! L
Anemone trullifolia 'Lutea' ! L
Anemone tschernaewii ! B
Anemone tuberosa ! C *
Anemone virginiana ! B
Anemone x hybrida 'Honorine Jobert' ! B *
Anemone x hybrida 'Josephine' ! B
Anemone x hybrida 'September Charm' ! B
Anemone x hybrida 'September Sprite' ! B
Anemone x lesseri ! A
Anemonella thalictroides ! G 2 *
Anemonoides baldensis ! A
Anemonopsis macrophylla ! A *
Anemopsis californica A *
Anethum graveolens A
Angelica archangelica A 3
Angelica archangelica subsp. litoralis A 3
Angelica arguta L 7
Angelica atropurpurea ! L 3
Angelica dahurica ! A 3
Angelica gigas ! A 3
Angelica grayi A 3
Angelica hispanica ! L *
Angelica keiskei ! A 3 7
Angelica pachycarpa A
Angelica sachalinensis ! ?
Angelica sinensis ! A 3
Angelica sp. ! C
Angelica sylvestris ! A 3
Angelica sylvestris 'Purpurea' ! A 3
Angelica sylvestris 'Vicar`s Mead' ! A 3
Angelica ursina ! A 3
Angelonia angustifolia A
Anigozanthos manglesii A
Anisodus luridus F
Anomatheca laxa A 3 *
Anomatheca laxa var. alba A 3 *
Anomatheca sp. A
Antennaria alpina F
Antennaria dioica A
Antennaria dioica 'Minima' F
Antennaria dioica 'Nyewoods Variety' F
Antennaria dioica 'Rosea' F
Antennaria dioica 'Rubra' F
Antennaria dioica var. rosea F
Antennaria friesiana F
Antennaria linearifolia A
Antennaria media L 3
Antennaria monocephala A
Antennaria neglecta F
Antennaria neglecta var. gaspensis F
Antennaria neodioica subsp. rosea A
Antennaria nitida A
Antennaria pulcherrima A
Antennaria rosea F
Antennaria rosea subsp. confinis A
Antennaria rosea subsp. pulvinata A
Antennaria solitaria A
Antennaria sp. F
Antennaria straminea A
Antennaria suffrutescens A
Anthemis aizoon B 3
Anthemis carpatica A
Anthemis carpatica subsp. pyrethriformis A
Anthemis cretica A
Anthemis cretica ssp. carpatica 'Karpatenschnee' A
Anthemis cretica subsp. pontica A
Anthemis marschalliana A
Anthemis pauciloba A
Anthemis rudolphiana A
Anthemis sancti-johannis A
Anthemis sp. A
Anthemis sterilis K
Anthemis tinctoria A
Anthemis tinctoria 'Wargrave Variety' A
Anthemis tranzscheliana K
Anthemis triumfettii A
Anthericum liliago A
Anthericum liliastrum L
Anthericum lusitanicum L
Anthericum ramosum J
Anthriscus cerefolium A 1 3
Anthriscus sylvestris 'Ravenswing' A *
Anthyllis coccinea B 3 7
Anthyllis hermanniae L
Anthyllis montana A 6 7 *
Anthyllis montana 'Rubra' A 6 7
Anthyllis montana subsp. atropurpurea ! A 3 7
Anthyllis montana subsp. jacquinii A 6 7
Anthyllis vulneraria ! A 3 7
Anthyllis vulneraria subsp. alpestris A 3 7
Anthyllis vulneraria subsp. pulchella K 6 7
Anthyllis vulneraria var. coccinea ! A 3 7
Anticlea elegans J
Antirrhinum braun-blanquetii A
Antirrhinum Chandelier Lilac Blush' A
Antirrhinum hispanicum A
Antirrhinum majus A
Antirrhinum majus 'Black Prince' A
Antirrhinum majus 'Rocket Red' A
Antirrhinum majus subsp. majus A
Antirrhinum molle A *
Antirrhinum sempervirens L
Antirrhinum sp. A
Apios americana K 7
Apocynum androsaemifolium A
Aquilegia 'Lime Sorbet' A
Aquilegia 'Pink Ruffle' A
Aquilegia akitensis A
Aquilegia all species *
Aquilegia alpina ! A 4
Aquilegia amaliae A
Aquilegia atrata E
Aquilegia aurea A
Aquilegia barnebyi A
Aquilegia bertolonii ! A 3
Aquilegia bertolonii 'Blue Berry' A
Aquilegia Biedermeier Group A
Aquilegia Blue Jay' (Songbird Series) A
Aquilegia borodinii A
Aquilegia brevistyla A 3
Aquilegia buergeriana ! A
Aquilegia caerulea A
Aquilegia canadensis J
Aquilegia canadensis 'Corbett' J 4 *
Aquilegia canadensis 'Little Lanterns' J
Aquilegia canadensis 'Nana' J 4 *
Aquilegia chaplinei A 2 4
Aquilegia chrysantha A 2 4
Aquilegia chrysantha 'Yellow Queen' A 2 4
Aquilegia chrysantha var. chaplinei A 2 4
Aquilegia clematiflora A
Aquilegia columbiana A
Aquilegia desertorum A
Aquilegia discolor D 4
Aquilegia Dwarf Fantasy' A 4
Aquilegia ecalcarata ! J
Aquilegia elegantissima A
Aquilegia flabellata A 4
Aquilegia flabellata 'Alba' A 4
Aquilegia flabellata 'Cameo Pink' (Cameo Series) A 4
Aquilegia flabellata 'Flore Pleno Alba' A 4
Aquilegia flabellata 'Ministar' A 4
Aquilegia flabellata 'Nana Alba' A 4
Aquilegia flabellata 'Nana' A 4
Aquilegia flabellata Cameo Series A 4
Aquilegia flabellata f. alba A 4
Aquilegia flabellata var. kurilensis A 4
Aquilegia flabellata var. nana A 4
Aquilegia flabellata var. pumila A 4
Aquilegia flabellata var. pumila f. alba A 4
Aquilegia flavescens L
Aquilegia formosa A
Aquilegia formosa ssp.. canadensis A
Aquilegia fragrans A
Aquilegia glandulosa A
Aquilegia glandulosa var. jucunda A
Aquilegia grahamii L
Aquilegia Hensol Harebell' A
Aquilegia hybrid A
Aquilegia hybrida A 3
Aquilegia hybrids A
Aquilegia jonesii A 3
Aquilegia jonesii x saximontana ! A 4
Aquilegia karelinii ! J
Aquilegia Kristall' A
Aquilegia kurdistanica L
Aquilegia laramiensis A 4
Aquilegia Leprechaun Gold' A
Aquilegia longissima A
Aquilegia Magpie' A
Aquilegia McKana Group A
Aquilegia micrantha A
Aquilegia micrantha v. grahamii A
Aquilegia microphylla A 4
Aquilegia montana A
Aquilegia Mrs Scott Elliot hybrids A
Aquilegia nigricans A
Aquilegia nigricans subsp. subscaposa A
Aquilegia olympica L
Aquilegia Origami Mix' A
Aquilegia ottonis A
Aquilegia oxysepala L
Aquilegia parviflora A
Aquilegia Perfumed Garden Group A
Aquilegia pyrenaica A
Aquilegia pyrenaica subsp. cazorlensis G 4
Aquilegia pyrenaica subsp. discolor A
Aquilegia Red Hobbit' A
Aquilegia saximontana G 4 *
Aquilegia saximontana cross G 4 *
Aquilegia saximontana x jonesii A
Aquilegia scopulorum G 4 *
Aquilegia shockleyi A 3
Aquilegia sibirica A
Aquilegia sp. A
Aquilegia subscaposa A
Aquilegia thalictroides A
Aquilegia triternata J
Aquilegia ullepitschii A
Aquilegia viridiflora A 3
Aquilegia vulgaris A
Aquilegia vulgaris 'Burnished Rose' A
Aquilegia vulgaris 'Magpie' A
Aquilegia vulgaris 'Nivea' A
Aquilegia vulgaris 'Pink Petticoat' A
Aquilegia vulgaris 'William Guiness' A
Aquilegia vulgaris 'Winky Purple-White' A
Aquilegia vulgaris 'Woodside' (Vervaeneana Group) A
Aquilegia vulgaris double A
Aquilegia vulgaris Grandmother's Garden Group A
Aquilegia vulgaris hybrid A
Aquilegia vulgaris v. stellata 'Blue Barlow' A
Aquilegia vulgaris var. alba A
Aquilegia vulgaris var. flore-pleno A
Aquilegia vulgaris var. flore-pleno 'Tower Light Blue' A
Aquilegia vulgaris var. floro-plena 'Double Pleat' A
Aquilegia vulgaris var. stellata A
Aquilegia vulgaris var. stellata 'Black Barlow' (Barlow Series) A
Aquilegia vulgaris var. stellata 'Blue Barlow' A
Aquilegia vulgaris var. stellata 'Nora Barlow' A
Aquilegia vulgaris var. stellata 'Ruby Port' A
Aquilegia Winky Purple-White' A
Aquilegia x hybrida A
Aquilegia x scopulorum G 4
Aqulilegia sp. A
Arabis all species A
Arabis allionii A
Arabis alpina A *
Arabis alpina ssp. caucasica A *
Arabis alpina ssp. Caucasica 'Rosea' A *
Arabis androsacea A
Arabis blepharophylla A
Arabis blepharophylla 'Fruhlingszauber' A
Arabis blepharophylla 'Red Sensation' A
Arabis bryoides F
Arabis caerulea A
Arabis caucasica A 3
Arabis caucasica 'Rosea' A 3
Arabis caucasica 'Schneehaube' A 3
Arabis caucasica 'Snowfix' A *
Arabis collina A
Arabis collina subsp. rosea A
Arabis koehleri A
Arabis muralis A
Arabis pieninica A *
Arabis pumila A
Arabis purpurea A
Arabis scopoliana A 3
Arabis sp. A
Arabis stelleri var. japonica A
Arabis Variegata' ? 3
Arabis x arendsii A
Arabis x arendsii 'Rosabella' L
Arabis x sturii A
Aralia cachemirica L
Aralia californica G
Aralia chinensis G
Aralia continentalis G
Aralia cordata ! L
Aralia cordata 'Sun King' ! L
Aralia cordata var. sachalinensis ! L
Aralia edulis ! L
Aralia elata G
Aralia elata 'Variegata' G
Aralia hispida L
Aralia nudicaulis ! H *
Aralia racemosa ! H 4
Aralia sp. H 6 8 *
Arctanthemum arcticum A
Arcterica nana K
Arctostaphylos all species L 3 6 7 *
Arctostaphylos uva-ursi ! G 6 7 *
Arctotis acaulis A
Arctotis adpressa A
Arctotis fastuosa A
Arctotis grandis A
Arctotis rosea A
Arctotis stoechadifolia A
Arctotis venusta A
Ardisia primulifolia ? *
Arenaria all species A
Arenaria balearica A
Arenaria cretica A 3
Arenaria festucoides B
Arenaria grandiflora A
Arenaria kingii A
Arenaria ledebouriana F
Arenaria longifolia A
Arenaria montana A
Arenaria norvegica A *
Arenaria obtusiloba A
Arenaria procera subsp. glabra A
Arenaria pseudacantholimon A *
Arenaria sp. A
Arenaria tetraquetra A
Arenaria tetraquetra subsp. amabilis A
Argemone grandiflora A 2
Argemone hispida L *
Argemone mexicana K
Argemone mexicana var. ochroleuca K
Argemone sp. K
Argemone squarrosa A
Argemone squarrosa subsp. glabrata A
Argentina egedii A
Argyranthemum frutescens A
Argyranthemum pinnatifidum A
Arisaema all species 8 *
Arisaema amurense A 8 *
Arisaema angustatum var. peninsulae A 8 *
Arisaema atrorubens A 8 *
Arisaema bockii B 8 *
Arisaema candidissimum A 8 *
Arisaema ciliatum A 8 *
Arisaema ciliatum 'Sky Wish' A 8 *
Arisaema ciliatum var. liubaense A 8 *
Arisaema consanguineum A 8 *
Arisaema consanguineum 'The Perfect Wave' A 8 *
Arisaema dracontium A 8 *
Arisaema engleri B 8 *
Arisaema fargesii A 8 *
Arisaema flavum A 8 *
Arisaema flavum subsp. abbreviatum B 8 *
Arisaema griffithii A 8 *
Arisaema helleborifolium A 8 *
Arisaema heterophyllum A 8 *
Arisaema himalaicum 8 *
Arisaema jacquemontii A 8 *
Arisaema japonicum A 8 *
Arisaema ovale B 8 *
Arisaema peninsulae A 8 *
Arisaema quinatum 8 *
Arisaema ringens A 8 *
Arisaema robustum A 8 *
Arisaema serratum A 8 *
Arisaema serratum 'Silver Leaf Form' A 8 *
Arisaema serratum var. serratum A 8 *
Arisaema sikokianum A 8 *
Arisaema sikokianum x takedae A 2 8 *
Arisaema sp. D 8 *
Arisaema speciosum F 8 *
Arisaema tortuosum A 8 *
Arisaema triphyllum A 8 *
Arisaema triphyllum 'Mrs French's veined form' A 8 *
Arisaema triphyllum 'Starburst' A 8 *
Arisaema triphyllum subsp. quinatum A 8 *
Arisaema urashima A 8 *
Arisaema utile A 8 *
Arisaema yunnanense A 8 *
Arisarum proboscideum A
Aristea capitata C
Aristlochia firmbriata A 7 8
Aristolochia contorta A
Aristolochia fimbriata A 7
Aristolochia littoralis A
Armeria alliacea L
Armeria alliacea f. leucantha L
Armeria alpina A *
Armeria Bee's hybrids A
Armeria bourgaei A 2
Armeria caespitosa ! A *
Armeria duriaei A 2
Armeria euscadiensis A
Armeria filicaulis A 2
Armeria formosa hybrids A
Armeria hybrida A 7
Armeria Joystick Red' A
Armeria Joystick Series A
Armeria juniperifolia A *
Armeria latifolia A
Armeria latifolia var. macrantha B
Armeria maritima A 2
Armeria maritima 'Laucheana ' A 2
Armeria maritima 'Ministicks White' A 2
Armeria maritima 'Rubrifolia ' A 2
Armeria maritima 'Vindictive' A 2
Armeria maritima subsp. alpina A 2
Armeria maritima subsp. bottendorfensis A 2
Armeria maritima subsp. elongata A 2
Armeria maritima subsp.sibirica A 2
Armeria maritima var. labradorica A 2
Armeria morisii B
Armeria Ornament' A 7
Armeria plantaginea B
Armeria pseudarmeria B
Armeria rhodopea A
Armeria rubrifolia K
Armeria rumelica A
Armeria ruscinonensis A 2
Armeria scabra A 2
Armeria scabra subsp. sibirica A 2
Armeria scabra var. sibirica A 2
Armeria sp. A
Armeria splendens A 2
Armeria trojana A
Armeria Vesuvius' B
Armeria welwitschii A
Arnebia echioides A
Arnebia pulchra C
Arnica alpina A
Arnica angustifolia J
Arnica angustifolia subsp. iljinii J
Arnica chionopappa K
Arnica cordifolia K
Arnica frigida A
Arnica iljinii A
Arnica lonchophylla K
Arnica longifolia A
Arnica montana A
Arnica montana subsp. montana A
Arnica nevadensis A
Arnica sachalinensis ?
Arnica sp. ?
Aronia melanocarpa G 7
Aronia melanocarpa ?Red Viking? C
Aronia melanocarpa 'Autumn Magic' J 7
Aronia x prunifolia G 7
Artemisia chamaemelifolia F
Artemisia cretacea A
Artemisia dracunculus F
Artemisia frigida A 3
Artemisia genipi F
Artemisia lactiflora (Guizhou group) F
Artemisia ludoviciana 'Valerie Finnis' B 3 *
Artemisia molinieri A
Artemisia nutans A
Artemisia pamirica A 2
Artemisia Powis Castle' A 3
Artemisia rutifolia ?
Artemisia stelleri A
Artemisia stelleriana 'Boughton Silver' F
Artemisia stelleriana 'Silver Brocade' F
Artemisia vachanica A
Artemisia vallesiaca A
Artemisia viridis A
Arthropodium candidum L
Arthropodium cirrhatum A
Arum Chameleon' ! D 2 7 *
Arum concinnatum ! D 2 7 *
Arum dioscoridis H *
Arum italicum ! D 2 7 *
Arum italicum ?White Winter' ! D 2 7 *
Arum italicum 'McClement Form' ! D 2 7 *
Arum italicum 'Pictum ' ! D 2 7 *
Arum italicum subsp. italicum 'Marmoratum' ! D 2 7 *
Arum maculatum ! D 2 7 *
Arum palaestinum ! D 2 7 *
Arum sp. ! D 2 7 *
Aruncus aestivus J 3
Aruncus aethusifolius J
Aruncus aethusifolius 'Noble Spirit' H
Aruncus dioicus A
Aruncus dioicus 'Kneiffii ' A
Aruncus dioicus var. aethusifolius J
Aruncus hybrid K
Aruncus laciniatus E
Aruncus Misty Lace' ? *
Aruncus most species *
Aruncus sp. K
Aruncus sylvester J 3
Aruncus vulgaris A
Asarina erubescens A
Asarina Joan Lorraine' A
Asarina procumbens A 3
Asarina purpusii A
Asarina scandens A
Asarina scandens 'Joan Lorraine' A
Asarina sp. A
Asarum canadense ! E *
Asarum europaeum ! E 8 *
Asclepias all species *
Asclepias curassavica A
Asclepias exaltata J
Asclepias incarnata A 1 3 *
Asclepias incarnata 'Alba' J 1 3 *
Asclepias incarnata 'Cinderella ' J 1 3 *
Asclepias incarnata 'Ice Ballet' J 1 3 *
Asclepias incarnata 'Soulmate' J 1 3 *
Asclepias purpurascens G
Asclepias purpurea J
Asclepias sp. A *
Asclepias speciosa J
Asclepias syriaca A
Asclepias tuberosa A 1 *
Asclepias tuberosa 'Hello Yellow' A 1 *
Asclepias tuberosa Gay Butterflies Group A 1 *
Asclepias verticillata L
Asimina triloba ! J
Asparagus officinalis A 7
Asparagus officinalis A 7
Asparagus officinalis var. psuedoscaber A 7
Asperula abchasica L
Asperula azurea A
Asperula capitata A 3
Asperula glauca ?
Asperula glomerata subsp. glomerata A 3
Asperula gussonei A
Asperula nitida L
Asperula nitida subsp. hirtella L
Asperula orientalis A
Asperula tinctoria J
Asphodeline damascena A
Asphodeline liburnica A 2
Asphodeline lutea A
Asphodeline sp. K
Asphodeline taurica A
Asphodelus albus A
Asphodelus cerasiferus B
Asphodelus damascenus A
Asphodelus fistulosus K
Asphodelus luteus A
Aspleniaceae whole genus A *
Asplenium trichomanes A *
Aster acuminatus B
Aster ageratoides A 3
Aster ageratoides 'Star Shine' A
Aster ageratoides 'Tiny Theo' A 3
Aster all species *
Aster alpigenus A
Aster alpinus A
Aster alpinus 'Albus' A
Aster alpinus 'Dark Beauty' J
Aster alpinus 'Goliath' J
Aster alpinus 'Happy End' J
Aster alpinus 'Maerchenland' A
Aster alpinus 'Pinkie' J
Aster alpinus 'White Beauty'' J
Aster alpinus hybrid J
Aster alpinus subsp. dolmiticus J
Aster altaicus B 3
Aster amellus 'Rudolphe Goethe' ! L
Aster asteroides ssp. costei A 3
Aster chinensis 'Hulk' B
Aster coloradoensis B
Aster conspectus B 2
Aster cordifolius B
Aster diplostephioides J
Aster divaricatus B
Aster dumosus 'Gold Flake' B
Aster ericoides ! H
Aster farreri B
Aster flaccidus B
Aster gracilentus A
Aster heterochaeta B
Aster himalaicus B
Aster kantoensis B 3
Aster laevis B
Aster lateriflorus B
Aster likiangensis J
Aster linariifolius B
Aster linosyris ! L
Aster maritimus A 3
Aster mongolicus B
Aster nemoralis B
Aster nepaulensis B
Aster novae-angliae B
Aster oblongifolius 'October Skies ' B
Aster ptarmicoides 'Summer Snow' B
Aster Purple Dome' B
Aster sibiricus B
Aster sikkimmensis B
Aster Snow Flurry' (Novi belgii) B
Aster souliei B
Aster sp. J
Aster stracheyi B
Aster tataricus J
Aster tongolensis B
Aster tongolensis 'Wartburg Star' B
Aster umbellatus B
Aster x frikartii B
Aster x frikartii 'Wunder von Stafa ' B
Aster yunnanensis B
Asteromoea mongolica A
Astilbe biternata A 3
Astilbe chinensis A 3 *
Astilbe chinensis 'Vision in Red' A 3 *
Astilbe chinensis var. davidii A 3 *
Astilbe chinensis var. pumila A 3 *
Astilbe Fanal' (x arendsii) A 3
Astilbe hybrid A *
Astilbe rubra A
Astilbe rubra 'Purple Candles' A
Astilbe rubra 'Valerie' A
Astilbe simplicifolia A
Astilbe sp. A 3 *
Astilbe thunbergii var. formosa A
Astilbe Willie Buchanan' A
Astilboides all species *
Astilboides tabularis A 3 *
Astracantha gummifera A 1 6 7
Astragalus alexandrii K 6
Astragalus all species *
Astragalus alpinus A 1 6 *
Astragalus alyssoides A 1 6 7 *
Astragalus canadensis A 1 6 7 *
Astragalus centralpinus A 6 7
Astragalus cicer K 6
Astragalus crassicarpus A 6 7
Astragalus danicus L 1 6 7 *
Astragalus frigidus A 1 6 7 *
Astragalus glycyphyllos A 1 6 7 *
Astragalus gummifera A 1 6 7
Astragalus lasiopetalus A 1 6 7 *
Astragalus membranaceus J 6 7 *
Astragalus mongholicus A 6 7
Astragalus neglectus A 6 7
Astragalus parryi *
Astragalus pelecinus A 6 7
Astragalus penduliflorus A 6 7
Astragalus propinquus J 6 7
Astragalus purshii A 1 6 7 *
Astragalus roemeri *
Astragalus sericeus A 1 6 7 *
Astragalus sinicus J 7
Astragalus sp. A 1 6 7 *
Astragalus suzgatus A 1 6 7
Astragalus whitneyi A 1 6 7 *
Astrantia carniolica var. rubra ! B 2
Astrantia major 'Alba' ! H 2
Astrantia major 'Lars ' ! H 2
Astrantia major 'Roma' ! H 2
Astrantia major 'Rubra' ! H 2
Astrantia major 'Ruby Cloud' ! H 2
Astrantia major 'Ruby Wedding' ! H 2
Astrantia major 'Sparkling Stars Pink' ! H 2
Astrantia major 'Star of Billion' ! H 2
Astrantia major 'Sunningdale Variegated' ! H 2
Astrantia major 'Variegata' ! H 2
Astrantia major 'White Star' ! H 2
Astrantia major subsp. carnolica ! H 2
Astrantia major subsp. involucrata 'Shaggy' ! H 2
Astrantia major var. rosea ! H 2
Astrantia maxima ! H 2
Astrantia maxima 'Alba' ! H 2
Astrantia sp. ! H 2
Asyneuma limonifolium L
Athamanta Denver Lace' ?
Athamanta turbith A
Athamanta turbith subsp. haynaldii A
Athyrium filix-femina 'Victoriae' A *
Athyrium niponicum A *
Atragene ochotensis D 9
Atraphaxis sp. L
Atriplex 'Red Flash' A
Atriplex hortensis A
Atriplex hortensis var. rubra A
Atropa belladonna L 4 7
Aubrieta Blue Cascade' (Cascade Series) A
Aubrieta canescens A
Aubrieta deltoidea A
Aubrieta deltoidea 'Nana Variegata' A
Aubrieta gracilis K
Aubrieta intermedia A 3
Aubrieta kotschyi A 3
Aubrieta macedonica A
Aubrieta most species A
Aubrieta parviflora A 3
Aubrieta pinardii A
Aubrieta scardica A
Aubrieta sp. A
Aureolaria virginica ! G
Aurinia corymbosa A
Aurinia saxatilis A
Aurinia saxatilis 'Carpet of Gold' A
Aurinia saxatilis 'Citrina ' A
Aurinia saxatilis 'Compacta' A
Aurinia saxatils 'Citrinum' A
Avenella flexuosa A
Azalea Boudoir' A *
Azalea Ghent hybrid A *
Azalea kiusianum 'Komo Kulshan' A *
Azalea Mollis hybrid A *
Azalea Phyllis Moore' A *
Azalea Sandra Hinton' A *
Azalea sp. A *
Baccharis magellanica K
Baileya multiradiata A
Ballota acetabulosa A
Ballota pseudodictamnus A
Balsamorhiza sagittata J
Banksia ericifolia J *
Baptisia 'Solar Flare' A 7 *
Baptisia 'Vanilla Cream' A 7 *
Baptisia 'Vanilla Cream' A 7 *
Baptisia alba A 7 *
Baptisia australis A 7 *
Baptisia australis 'Blueberry Sundae' A 7 *
Baptisia Blueberry Sundae' A 7 *
Baptisia Dutch Chocolate' A 7 *
Baptisia hybrid A 7 *
Baptisia lactea A 7 *
Baptisia Lemon Meringue' A 7 *
Baptisia leucantha G 7 *
Baptisia leucophaea G 7 *
Baptisia perfoliata J *
Baptisia Prairieblues Series A 7 *
Baptisia sp. A 7 *
Baptisia tinctoria A 6 7 *
Baptisia Twilite' A 7 *
Baptisia variicolor 'Twilite'(Pairieblues Series) A 7 *
Baptisia x variicolor 'Twilite' A 7 *
Barbarea rupicola A
Barnardia japonica A
Barnardia numidica A
Bartsia alpina E
Begonia boliviensis A 3
Begonia grandis A
Begonia grandis 'Alba' A
Begonia grandis ssp. sinensis A
Begonia grandis subsp. evansiana A
Begonia sp. A
Begonia sutherlandii A 3
Begonia x albopicta A
Belamcanda chinensis A 3 *
Belamcanda sp. A
Bellevalia forniculata J
Bellevalia hyacinthoides J *
Bellevalia paradoxa J
Bellevalia pycnantha J
Bellevalia species ?
Bellevalia trifoliata H
Bellis perennis A
Bellis sp. A
Bellium bellidioides A
Berberis aquifolium ]X H 8 *
Berberis hybrid G 8 *
Berberis koreana F 8 *
Berberis Red Tears' J 8 *
Berberis thunbergii G 8 *
Berberis thunbergii f. atropupurea 'Gold Ring' G 8 *
Berberis thunbergii 'Aurea ' G 8 *
Berberis thunbergii f. atropurpurea 'Rose Glow' G 8 *
Berberis vulgaris K *
Bergenia cordifolia A
Bergenia cordifolia 'Purpurea ' A
Berkheya purpurea A
Berkheya purpurea 'Zulu Warrior' A
Berlandiera lyrata A
Besseya bullii G 3
Betonica abchasica A
Betonica officinalis A
Betonica officinalis 'Hummelo' A
Betonica officinalis 'Pink Cotton Candy' A
Betula alba A 3 *
Betula albosinensis G 3
Betula apoiensis J
Betula ermanii A 3 *
Betula glandulosa G 4
Betula jacquemontii G 3
Betula lenta L
Betula lenta L
Betula michauxii G
Betula middendorffii J 3
Betula ovalifolia G
Betula pendula J
Betula pendula ?Golden Cloud? J
Betula pendula 'Golden Cloud' J
Betula pendula ssp. pendula 'Golden Cloud' J
Betula pubescens A 3
Betula pumila L
Betula sp. J
Betula utilis var. jacquemontii A 3
Bidens ferulifolia A
Bidens ferulifolia 'Golden Eye' A
Bidens lutea ?
Bidens pilosa A
Bidens polylepis J
Bidens sp. A
Biscutella laevigata A
Biserrula pelecinus A 6 7
Bituminaria bituminosa A
Bituminaria morisiana A 6
Blechnum penna-marina A *
Blephilia ciliata F
Bletilla striata A *
Blumenbachia hieronymi A
Boechera koehleri A
Boehmeria japonica A
Boehmeria nivea A
Boehmeria tricuspis A
Boenninghausenia albiflora A
Boerhavia orientalis L
Boltonia asteroides A 3
Boltonia asteroides var. latisquama A 3
Boltonia asteroides var. latisquama 'Jim Crockett' A 3
Boltonia asteroides var. latisquama 'Nana' A 3
Boltonia lautureana ?
Bomarea formosissima A 1 6 7 *
Borago officinalis A 1
Borago officinalis 'Alba' A 1
Borago officinalis 'Bianca' A 1
Borago pygmaea A
Bornmuellera tymphaea A
Bouteloua curtipendula A
Bouteloua gracilis A
Bouteloua gracilis 'Bad River' ]X A
Boykinia aconitifolia A 3
Boykinia elata B
Boykinia jamesii L 3
Boykinia major ! L
Boykinia occidentalis B
Boykinia rotundifolia B
Boykinia sp. B
Brachyelytrum sp. J
Brachyscome iberidifolia A 3
Brachyscome sp. A
Bracteantha bracteata A
Brassica all species A
Brassica jordanoffii A
Brassica nivalis A
Brassica oleracea 'Redbor' A
Brassica oleracea var. acephala A
Brassica oleracea var. alboglabra A
Brassica repanda A
Brassica sp. A
Braya alpina A 3 7 *
Brimeura amethystina H
Brimeura amethystina 'Alba' H
Briza maxima A
Briza media A
Briza minor A
Brodiaea elegans ! A
Brodiaea howellii K
Brodiaea laxa A
Brodiaea pulchella F
Brodiaea Queen Fabiola' B
Bromus kalmii A
Browallia americana A 3
Browallia americana A 3
Browallia speciosa A 3
Brugmansia hybrid A
Brugmansia sp. A
Brunnera macrophylla A
Bryonia alba G
Bryonia dioica G
Buddleja davidii A 3 *
Buddleja davidii 'Black Knight' A 3 *
Buddleja davidii 'Mongo' A 3 *
Buddleja japonica A 3 *
Buddleja sp. A 3 *
Buddleja x weyeriana 'Honeycombe' A *
Bukiniczia cabulica A
Bulbine bulbosa A
Bulbine caulescens A
Bulbine frutescens A
Bulbine semibarbata A 2
Bulbocodium vernum ! D *
Bunias orientalis A
Bunium bulbocastanum A
Buphthalmum salicifolium A
Bupleurum aureum A
Bupleurum falcatum A
Bupleurum fruticosum A 3
Bupleurum griffithii J 3
Bupleurum longifolium ! D
Bupleurum lophocarpum A
Bupleurum ranunculoides A 2
Bupleurum rotundifolium ! A 2
Bupleurum rotundifolium 'Green Gold' ! A 2
Bupleurum salicifolium A
Bupleurum sp. A 1 3
Burchardia umbellata A
Buxus sempervirens 'Aurea Pendula' J
Cacalia alliariae ?
Cacalia auriculata A 3
Caccinia sp. ?
Caccinia strigosa A
Caesalpinia lutea A 6 7
Caesalpinia pulcherrima A
Caiophora prietea A
Calamagrostis arundinacea A 3
Calamagrostis brachytricha A
Calamintha grandiflora E
Calamintha nepeta B
Calamintha sp. ?
Calandrinia grandiflora A
Calandrinia sp. K *
Calandrinia umbellata A
Calanthe discolor *
Calanthe tricarinata A 2 *
Calceolaria andina B 3 *
Calceolaria biflora A
Calceolaria biflora 'Goldcrest' A
Calceolaria chelidonioides A 3
Calceolaria falklandica A
Calceolaria fothergillii ! A
Calceolaria Gold Cup' A
Calceolaria hirsuta A
Calceolaria mexicana A
Calceolaria polyrhiza A
Calceolaria sp. A 3
Calceolaria tripartita A
Calendula officinalis A
Calendula officinalis 'Bronzed Beauty' A
Calendula officinalis 'Indian Prince' A
Calendula officinalis 'Neon' A
Calendula officinalis 'Pacific Beauty' A
Calendula officinalis 'Radio' A
Calendula sp. A 2
Calibanus hookeri A *
Calla New Armour' A
Calla palustris ! E *
Calla pink Gem' A
Calla sp. A
Callianthemum anemonoides ! G
Callianthemum coriandrifolium L
Callianthemum kernerianum ! F
Callicarpa bodinieri A
Callicarpa bodinieri var. giraldii A
Callicarpa bodinieri var. giraldii 'Profusion' A
Callicarpa dichotoma L
Callicarpa dichotoma 'Issai' L
Callicarpa dichotoma f. albifructa L
Callicarpa japonica A
Callicarpa japonica 'Leucocarpa' A *
Callicarpa sp. ? 8
Callirhoe digitata A 1
Callirhoe involucrata A
Callirhoe triangulata A 6
Callistemon salignus A
Callistemon viminalis A
Callistephus chinensis A
Callistephus chinensis 'Hulk' A
Callistephus chinensis 'Pavlova Dark Blue' A
Calluna vulgaris A 3
Calluna vulgaris 'Dainty Bess' A 3
Calluna vulgaris 'White Lawn' A 3
Calochortus amoenus *
Calochortus barbatus G *
Calochortus macrocarpus G *
Calochortus nuttallii K *
Calochortus sp. *
Calochortus tolmiei J
Calopogon tuberosus *
Caltha biflora ! A *
Caltha leptosepala ! A *
Caltha leptosepala subsp. howellii ! A *
Caltha palustris ! L 5 *
Calycanthus 'Aphrodite' A
Calycanthus chinensis A
Calycanthus floridus A
Calycanthus floridus 'Purpurea ' A
Calydorea sp. A 4
Calylophus hartwegii subsp. fendleri A
Calylophus serrulatus L
Camassia cusickii F
Camassia cusickii 'Zwanenburg' F
Camassia leichtlinii F
Camassia leichtlinii subsp. leichtlinii F
Camassia leichtlinii subsp. suksdorfii 'Alba' F
Camassia leichtlinii subsp. suksdorfii Coerulea Group F
Camassia quamash F
Camassia quamash 'Blue Melody' F
Camassia quamash subsp. azurea G
Camassia quamash subsp. quamash F
Camassia scilloides G
Camassia sp. G
Camellia oleifera 'Plain Jane' A 6 7 *
Camellia sp. A 6 7
Campanula alata A
Campanula alliariifolia A
Campanula alliariifolia subsp. alliariifolia A
Campanula alpina A
Campanula americana G 3 *
Campanula argaea A
Campanula argyrotricha A 3
Campanula armena A
Campanula aucheri A
Campanula autraniana L
Campanula barbata A
Campanula barbata 'Darkest of All' A
Campanula barbata var. alba A
Campanula bellidifolia A
Campanula betulifolia A
Campanula bononiensis ?
Campanula calaminthifolia L
Campanula carnica A
Campanula carpatica A
Campanula carpatica 'Rapido White' A
Campanula carpatica 'Blue Clips' A
Campanula carpatica 'Glokkentappich Hellblau' A
Campanula carpatica 'Hannah' A
Campanula carpatica 'Rapid Blue' A
Campanula carpatica 'White Clips' A
Campanula carpatica f. alba A
Campanula carpatica f. alba 'Weisse Clips' A
Campanula carpatica var. turbinata A
Campanula carpatica var. turbinata f. alba E
Campanula cashmeriana A 3
Campanula celsii A
Campanula cenisia A
Campanula cephallenica A
Campanula cephalotes A 3
Campanula cervicaria A
Campanula cespitosa A
Campanula chamissonis L 3
Campanula choruhensis A
Campanula ciliata F
Campanula cochleariifolia A
Campanula collina A
Campanula cordifolia A
Campanula corymbosa A
Campanula cymbalaria A 3
Campanula dasyantha L 3
Campanula elegans A 3
Campanula fenestrellata subsp. istriaca A
Campanula formanekiana A
Campanula fragilis A
Campanula garganica A
Campanula garganica subsp. cephallenica A
Campanula glomerata A 3
Campanula glomerata 'Superba' A 3
Campanula glomerata var. acaulis A 3
Campanula glomerata var. alba A 3
Campanula grandis A
Campanula grossekii A
Campanula grossheimii A 3
Campanula hoffmannii A
Campanula hybrid A
Campanula incurva A 3
Campanula istriaca A
Campanula kemulariae A
Campanula Kent Belle' E
Campanula kirpicznikovii A
Campanula kolenatiana A
Campanula koreana A
Campanula lactiflora A
Campanula lactiflora 'Alba' A
Campanula latifolia A 3
Campanula latifolia 'Brantwood' A 3
Campanula latifolia f. alba A 3
Campanula latifolia ssp. latifolia 'Alba' A 3
Campanula latifolia var. macrantha A 3
Campanula latifolia var. macrantha 'Alba' A 3
Campanula latifolia var. macrantha 'Superba' A 3
Campanula latiloba A
Campanula ledebouriana A
Campanula lingulata A
Campanula linifolia A
Campanula lyrata L 3
Campanula macrantha A 3
Campanula makaschvilii A
Campanula medium A
Campanula medium 'Flore Pleno' A
Campanula medium var. calycanthema A
Campanula moesiaca A
Campanula ochroleuca A
Campanula orphanidea A
Campanula patula B
Campanula patula subsp. abietina B
Campanula pelviformis A
Campanula pendula A
Campanula peregrina A
Campanula persicifolia A
Campanula persicifolia 'Alba Coronata' A
Campanula persicifolia 'Flore Pleno' A
Campanula persicifolia 'Nitida Alba' A
Campanula persicifolia 'Telham Beauty' A
Campanula persicifolia f. alba A
Campanula persicifolia var. planiflora A
Campanula pilosa L 3
Campanula portenschlagiana A 3
Campanula poscharskyana B
Campanula primulifolia A
Campanula pulla A 3
Campanula punctata A 3
Campanula punctata 'Rubra' A 3
Campanula punctata f. albiflora 'Alba' A 3
Campanula punctata f. albiflora 'Nana Alba' A 3
Campanula punctata var. hondoensis A 3
Campanula pyramidalis A
Campanula pyramidalisf. alba A
Campanula raddeana A
Campanula radicosa A 3
Campanula raineri G
Campanula ramosissima A 3
Campanula rapunculoides A 3 *
Campanula rapunculoides subsp. rapunculoides A 3 *
Campanula rhomboidalis A
Campanula rigidipila A 3
Campanula rotundifolia A
Campanula rotundifolia 'Mingan' A
Campanula Samantha' A
Campanula sarmatica A
Campanula sartorii A
Campanula saxifraga A
Campanula saxifraga ssp. aucheri A
Campanula scheuchzeri A
Campanula sibirica A
Campanula sp. L
Campanula sparsa ?
Campanula speciosa B
Campanula spicata A 3
Campanula Stansfieldii' A
Campanula stellata L
Campanula stevenii L
Campanula takesimana A 3
Campanula teucrioides A
Campanula thessala J
Campanula thyrsoides J
Campanula thyrsoidesssp. carniolica G
Campanula tommasiniana A
Campanula topaliana A
Campanula trachelium A
Campanula trachelium 'Bernice' A
Campanula tridentata A
Campanula uniflora A
Campanula verticillata L
Campanula vidalii A
Campanula waldsteiniana A
Campanula wanneri A
Campanula zangezura A
Campanula zoysii L *
Campsis radicans J *
Canna indica A 6 7 *
Canna paniculata A 6 7 *
Canna sp. A 6 7 *
Capnoides sempervirens ! A 3 *
Capsicum annuum A
Capsicum annuum 'Black Pearl' A
Capsicum annuum 'Explosive Ember' A
Capsicum annuum 'Gold Finger' A
Capsicum annuum var. annuum A
Capsicum chinense A
Capsicum frutescens A
Capsicum frutescens 'Purira' A
Capsicum sp. A 7
Caragana aurantiaca A 7
Caragana frutex A 7
Caragana pygmaea A 6 7 *
Cardiocrinum cordatum A *
Cardiocrinum cordatum var. glehnii H *
Cardiocrinum giganteum H *
Cardiocrinum giganteum var. yunnanense H *
Cardiocrinum sp. H *
Cardiospermum halicacabum A 3
Cardiospermum sp. A 7
Carduncellus monspeliensis A
Carduncellus pinnatus A
Carduus defloratus ?
Carduus glaucus A 2
Carex baccans A
Carex buchananii B
Carex buchananii 'Red Rooster' B
Carex comans A 3 *
Carex comans 'Bronze' A 3 *
Carex comans 'Frosted Curls ' A 3 *
Carex comans 'Frosted Curls' A 3
Carex cuprina A
Carex elata 'Aurea' A *
Carex elata 'Bowles Golden' A *
Carex flacca K
Carex flagellifera A
Carex flagellifera 'Bronze' A
Carex glauca K
Carex grayi A 3
Carex heleonastes G
Carex lupulina J
Carex lurida H
Carex Majken' K
Carex melanantha F
Carex melanocephala A 3
Carex muskingumensis A 3
Carex nigra E
Carex pendula D
Carex pseudocyperus D
Carex rosea H 7 8
Carex scandinavica L
Carex scaposa A 3
Carex schiedeana ? 3
Carex sp. J
Carex stellata ? 3
Carex viridula L
Carlina acanthifolia B
Carlina acaulis A 3
Carlina acaulis subsp. acaulis A 3
Carlina acaulis subsp. simplex A 3
Carlina caulescens A 3
Carlina corymbosa A
Carlina sp. ?
Carlina vulgaris D
Carpinus betulus C
Carya ovata L *
Caryopteris ? clandonensis 'Inoveris' Grand Bleu A
Caryopteris divaricata L
Caryopteris sp. L
Caryopteris x clandonensis A
Caryopteris x clandonensis 'Heavenly Blue' A
Caryopteris x clandonensis 'Kew Blue' A
Caryopteris x clandonensis 'Worchester Gold' A
Cassia covesii A 6 7
Cassia fasciculata J 6
Cassia hebecarpa A 6 7
Cassia marilandica J 6 7
Cassia sp. ? 6 7
Castanea americana G 7
Castilleja coccinea G
Castilleja miniata C *
Catalpa bignonioides A
Catalpa fargesii A
Catalpa sp. A
Catalpa speciosa A 7
Catananche caerulea A
Catananche caespitosa A
Caulophyllum thalictroides ! L 8 *
Cautleya spicata ! A
Ceanothus americanus L 6 7 *
Ceanothus arboreus 'Owlswood Blue' L 6 7
Ceanothus sp. L 6 7
Cedronella canariensis K
Cedrus deodara G
Celastrus scandens G
Celastrus sp. A *
Celmisia all species ! A *
Celmisia gracilenta A
Celmisia prorepens ! A
Celmisia traversii ! F
Celosia argentea A
Celosia argentea 'Flamingo Feather' A
Celosia argentea var. cristata (Plumosa Group) A
Celosia cristata 'Bombay Dark Red' A
Celosia hybrid A
Celosia New Look' A
Celosia plumosa A
Celosia sp. A
Celosia spicata A 3
Celosia trigyna A
Celsia acaulis A
Cenolophium denudatum J
Cenolophium sp. J
Centaurea americana A 2 6
Centaurea arpensis A
Centaurea atropurpurea A
Centaurea bella A
Centaurea cheiranthifolia A
Centaurea cheiranthifolia var. purpurascens A
Centaurea cyanus A
Centaurea cyanus 'Black Ball' A
Centaurea dealbata A
Centaurea drabifolia subsp. cappadocica A
Centaurea drabifolia subsp. drabifolia A
Centaurea fischeri A
Centaurea jacea A
Centaurea John Coutts' A
Centaurea macedonica ?
Centaurea macrocephala A
Centaurea melitensis A
Centaurea mixta A
Centaurea montana A
Centaurea montana 'Gold Bullion' A
Centaurea nigra A
Centaurea orientalis A
Centaurea phrygia A
Centaurea pindicola A
Centaurea pulcherrima A
Centaurea pulchra A
Centaurea rothrockii A 2
Centaurea rupestris A 2
Centaurea simplicicaulis A
Centaurea stenolepis A 2
Centaurea tchihatchewii A
Centaurea triumfettii A
Centaurea uniflora A
Centaurea uniflora subsp. nervosa A
Centaurea urvillei subsp. hayekiana A
Centaurium chloodes J
Centaurium confertum J
Centaurium erythraea A
Centaurium scilloides A 3
Centella asiatica A *
Centranthus ruber A
Centranthus ruber v .coccineus A
Centranthus sp A
Cephalanthera damasonium A *
Cephalanthus occidentalis 'Sputnik' A 3
Cephalanthus occidentalis A 3
Cephalaria alpina A
Cephalaria alpina 'Nana' F
Cephalaria gigantea B
Cephalaria leucantha B
Cephalaria tatarica B
Cephalaria tchihatchewii A 3
Cephalaria uralensis A
Cephalophora aromatica N *
Cerastium all species A
Cerastium alpinum B
Cerastium alpinum var. lanatum A 3
Cerastium banaticum A
Cerastium candidissimum A 3
Cerastium sp. A 3
Cerastium tomentosum A 3
Ceratocapnos heterocarpa ! E
Ceratostigma plumbaginoides A
Ceratotheca triloba A
Cercidiphyllum japonicum G
Cercis canadensis A 6 7 *
Cercis canadensis f. alba A 6 7 *
Cercis siliquastrum H *
Cercocarpus montanus G
Cerinthe glabra B
Cerinthe major A
Cerinthe major subsp. purpurascens A
Cestrum elegans A 3
Chaenomeles japonica A
Chaenomeles speciosa G
Chaenorhinum glareosum A
Chaenorhinum origanifolium A 3
Chaenorhinum sp. ?
Chaerophyllum aureum ! J
Chaerophyllum hirsutum `Roseum` ! L
Chaerophyllum hirsutum 'Album' ! L
Chaerophyllum maculatum ?
Chaerophyllum sp. ! A
Chamaebatiaria millefolium B
Chamaecrista fasciculata J 6
Chamaecyparis lawsoniana H *
Chamaecyparis pisifera A
Chamaecytisus austriacus A 1 3 6 7
Chamaecytisus hirsutus A 1 6 7
Chamaecytisus purpureus A 1 6 7
Chamaecytisus pygmaeus A 1 6 7
Chamaecytisus ratisbonensis A 1 6 7
Chamaedaphne calyculata A 3 *
Chamaenerion angustifolium ?
Chamerion crissum A
Chamerion fleischeri L
Chamerion hirsutum A
Chasmanthium latifolium G
Chasmanthium latifolium 'River Mist' G
Cheilanthes argentea A *
Cheilanthes lanosa A *
Cheiranthus all species A
Cheiranthus allionii A
Cheiranthus sp. A
Cheiranthus x allionii A
Chelidonium japonicum A
Chelidonium majus ! A *
Chelidonium majus 'Flore Pleno' ! E *
Chelone albida F *
Chelone glabra A 3
Chelone lyonii B
Chelone lyonii 'Hot Lips' B
Chelone obliqua A
Chelone obliqua var. alba A
Chelone sp. B *
Chelonopsis yagiharana A
Chenopodium nitidum L
Chiastophyllum oppositifolium A 3
Chilopsis linearis ! A 2
Chimaphila menziesii A *
Chimaphila umbellata A *
Chionanthus retusus C 7
Chionanthus virginicus C 7
Chionodoxa forbesii L *
Chionodoxa Lilacina' L *
Chionodoxa luciliae L *
Chondrosum gracile A
Chorispora bungeana A *
Chrysanthemum alpinum B
Chrysanthemum coccineum A
Chrysanthemum coccineum 'Robinson Mix' A
Chrysanthemum coronarium A
Chrysanthemum leontopodium A
Chrysanthemum macrophyllum ! A
Chrysanthemum minimum A
Chrysanthemum multicaule A
Chrysanthemum multicaule 'Moonlight' A
Chrysanthemum Sunny Side Up' A
Chrysanthemum tianschanicum A
Chrysanthemum weyrichii A
Chrysanthemum x superbum A
Chrysopsis falcata J
Chrysopsis mariana G
Chrysopsis villosa A
Chrysosplenium macrostemon var. shiobarense ! H *
Chrysothamnus nauseosus A
Cicerbita alpina A
Cimicifuga all species *
Cimicifuga americana E *
Cimicifuga dahurica E
Cimicifuga europaea ! C *
Cimicifuga foetida ! C *
Cimicifuga japonica C *
Cimicifuga racemosa ! C *
Cimicifuga ramosa B *
Cimicifuga rubifolia C *
Cimicifuga simplex C *
Cimicifuga sp. ! G *
Cirsium acaule B
Cirsium bertolonii K
Cirsium canum A
Cirsium diacantha A
Cirsium discolor J
Cirsium edule v. macounii A
Cirsium eriophorum A
Cirsium esculentum A
Cirsium hookerianum A
Cirsium japonicum K
Cirsium muticum A *
Cirsium proteanum ? *
Cirsium rivulare A
Cirsium rivulare 'Atropurpureum' A
Cirsium scariosum B
Cirsium spinosissimum K
Cirsium spinosissimum subsp. berthelonii K
Cirsium x eristhaloides L
Cistanthe grandiflora J
Cistus albanicus ! A
Cistus incanus A
Cistus sintenisii ! A
Cistus sp. A 6 *
Citrus trifoliata ! J
Cladanthus arabicus A 2
Cladanthus arabicus 'Golden Crown' A 2
Cladrastis kentukea G 6 *
Cladrastis lutea F 6 *
Clarkia amoena A
Clarkia pulchella A
Clarkia rubicunda subsp. blasdalei A
Clarkia sp. A
Clarkia unguiculata A
Claytonia caroliniana ! K *
Claytonia lanceolata ! K *
Claytonia megarhiza ! L *
Claytonia virginica ! C *
Clematis integrifolia from Lake Baikal L 9
Clematis 'Alionushka' C
Clematis 'Bluebird' D
Clematis 'Campanile' G 9
Clematis 'Golden Tiara' B
Clematis 'Haizawa' A 9
Clematis 'Kermesina' E
Clematis 'Mienie Belle' E 9 *
Clematis 'Omoshiro' ?
Clematis 'Petit Faucon? A 9
Clematis 'Rain Dance' L 9
Clematis 'Retrousse' ?
Clematis 'Sen-no-kaze? L
Clematis 'Senju' A
Clematis 'Spectrum' D 9
Clematis 'Twinkle' A 9
Clematis [Petit Faucon] ='Evisix' ? 9
Clematis Abundance' E 9
Clematis addisonii A
Clematis aethusifolia F 9
Clematis Alba Chirifu' A 4 9 *
Clematis Alba Luxurians' E 9
Clematis albicoma A
Clematis Alionushka' A 9
Clematis alpina D 9
Clematis alpina 'Albiflora' D 9
Clematis alpina 'Blue Dancer' D 9
Clematis alpina 'Columbine' D 9
Clematis alpina 'Constance' D 9
Clematis alpina 'Helsingborg' D 9
Clematis alpina 'Jacqueline du Pre' D 9
Clematis alpina 'Jan Lindmark' A 9
Clematis alpina 'Martha Rivers' D 9
Clematis alpina 'Odorata' D 9
Clematis alpina 'Pamela Jackman' D 9
Clematis alpina 'Pink Flamingo' D 9
Clematis alpina 'Rubra' D 9
Clematis alpina 'Ruby' D 9
Clematis alpina 'Stolwijk Gold' D
Clematis alpina subsp. sibirica D 9
Clematis alpina subsp. sibirica x ochotensis D 9
Clematis alpina var. ochotensis D 9
Clematis Amber Wheels' A
Clematis angustifolia ? 9
Clematis Arabella' E 9
Clematis Asao' L 9
Clematis Bees' Jubilee' L 9
Clematis Belle of Woking' L 9
Clematis Bill MacKenzie' F 9
Clematis Blue Belle' L 9
Clematis Blue Bird' B 9
Clematis Blue Eclipse' J 9
Clematis Blue Moon' L 9
Clematis Buckland Beauty' E 9 *
Clematis Burford Bell' C 9
Clematis Burford Bell' x crispa H
Clematis campaniflora B
Clematis Candy Cane' L 9
Clematis carrizoensis A
Clematis chiisanensis L 9
Clematis Clair de Lune' L 9
Clematis columbiana A 3
Clematis columbiana var. tenuiloba A 3
Clematis columbiana var. tenuiloba 'Ylva' A 3
Clematis crispa H
Clematis crispa 'Blue Jasmine' H
Clematis crispa x integrifolia H
Clematis davidiana G 9
Clematis Dawn' L 9
Clematis Doctor Ruppel' L 9
Clematis douglasii ! J 7 9
Clematis Everett' L 9
Clematis Evipo099 ?
Clematis fargesii var. soulei J 9
Clematis Fireworks' L 9
Clematis flammula C 9
Clematis Fleuri' (Boulevard series) ? 9
Clematis florida L 9
Clematis florida 'Pistachio' L 9
Clematis Frances Rivis' D 9
Clematis fremontii ! G 9
Clematis fremontii x integrifolia ! G 9
Clematis Fudo' E 9
Clematis fusca L 9
Clematis fusca var. violacea L 9
Clematis Garnet' ?
Clematis Gazelle' A 9
Clematis Gipsy Queen' G 9
Clematis glauca L 9
Clematis glaucophylla L 9
Clematis glaucophylla 'Pan Handler' L 9
Clematis Guernsey Cream' L 9
Clematis Hagley Hybrid' L 9
Clematis Harlequin' L 9
Clematis Henryi' L 9
Clematis heracleifolia G 9
Clematis heracleifolia 'Cassandra' A 9
Clematis heracleifolia 'Chantilly' G 9
Clematis heracleifolia 'China Purple' G 9
Clematis heracleifolia 'Clarissa' G 9
Clematis heracleifolia 'New Love' G 9
Clematis heracleifolia 'Wyevale' G 9
Clematis heracleifolia var. davidiana G 9
Clematis heracleifolia var. urticifolia G 9
Clematis hexapetala L 9
Clematis hirsutissima L
Clematis hirsutissima v. scottii ! L
Clematis hirsutissima var. scottii L
Clematis Hyde Hall' L 9
Clematis Hythe Egret' L 9
Clematis ianthina L 9
Clematis Ice Blue' L 9
Clematis integrifolia A 9
Clematis integrifolia 'Alba' A 9
Clematis integrifolia 'Baby White' A 9
Clematis integrifolia 'Fascination' A 9
Clematis integrifolia 'Gazelle' A 9
Clematis integrifolia 'Hendersonii ' A 9
Clematis integrifolia 'Lake Baikal' L 9
Clematis integrifolia 'Mongolian Bells' A 9
Clematis integrifolia 'Olgae' A 9
Clematis integrifolia 'Pamiat Serdtsa' A
Clematis integrifolia 'Pangbourne Pink' A 9
Clematis integrifolia 'Purpurea' A 9
Clematis integrifolia 'Rosea' A 9
Clematis integrifolia 'Swedish Bells' A 9
Clematis integrifolia 'Twinkle' A 9
Clematis intricata L 9
Clematis ispahanica J 4 9 *
Clematis jackmanii G 9
Clematis Jan Fopma' L 9
Clematis japonica L 9
Clematis koreana J
Clematis Koreana 'Fragrans' J
Clematis ladakhiana A 2
Clematis lasiandra A
Clematis lasiantha G
Clematis Liberation' L 9
Clematis ligusticifolia H 7 9
Clematis Little Nell' E 9
Clematis Lunar Lass' L 9
Clematis macropetala A 9
Clematis macropetala 'Alba' A 9
Clematis macropetala 'Blue Bird' A 9
Clematis macropetala 'Lagoon' A 9
Clematis macropetala 'Maidwell Hall' A 9
Clematis macropetala 'Markham's Pink' A 9
Clematis Madame Julia Correvon' E 9
Clematis mandschurica E 9
Clematis Margot Koster' L 9
Clematis Miss Bateman' L 9
Clematis montana A
Clematis montana var. montana A
Clematis Moonlight' L 9
Clematis morefieldii L
Clematis most species *
Clematis Mrs Harvey' L 9
Clematis Mrs Robert Brydon' J
Clematis napaulensis F 9
Clematis Nelly Moser' L 9
Clematis occidentalis D 9
Clematis occidentalis 'Big Horns' C 9
Clematis ochotensis J 9
Clematis ochotensis x alpina J 9
Clematis ochroleuca J
Clematis orientalis A 3 9
Clematis orientalis 'Annemieke' B 9
Clematis Pagoda' L 9
Clematis paniculata C
Clematis patens x 'Nara' ?
Clematis Paul Farges' L 9
Clematis Perle d'Azur' L 9
Clematis Petit Faucon' ? 9
Clematis pitcheri C 4 9
Clematis Polish Spirit' E 9
Clematis potaninii J 9
Clematis potaninii var. fargesii J 9
Clematis Prairie Traveller's Joy' F 9
Clematis Prince Charles' ?
Clematis Princess Diana' E 9 *
Clematis Princess Kate' L 9
Clematis Princess Red' H
Clematis Proteus' L 9
Clematis Radar Love' L 9
Clematis Ramona' L 9
Clematis recta ! A 2 *
Clematis recta 'Purpurea' ! A 2 *
Clematis recta 'Serious Black' ! A 2 *
Clematis rehderiana C 9
Clematis repens A
Clematis reticulata ?
Clematis Roguchi' A 9
Clematis Rooguchi' L 9
Clematis Rosy O'Grady' F 9
Clematis Rouge Cardinal' L 9
Clematis Ruby' D 9
Clematis scottii L
Clematis serratifolia ! J 7 9 *
Clematis serratifolia 'Kugotia' ! J 7 9 *
Clematis sibirica G
Clematis songarica L
Clematis Sonnette' A 9
Clematis sp. L
Clematis sp. L
Clematis speciosa ! A 9
Clematis stans G 9
Clematis Summer Snow' L 9
Clematis Swedish Bells' A 9
Clematis Sweet Summer Love' C 9 *
Clematis tangutica B 9
Clematis tangutica 'Radar Love' B 9
Clematis tenuiloba A 3
Clematis terniflora A 9
Clematis terniflora v. manshurica E 9
Clematis terniflora var. mandshurica E 9
Clematis texensis E 9 *
Clematis texensis 'Etoile Rose' E 9 *
Clematis texensis 'Gravetye Beauty' E 9 *
Clematis texensis 'Maxima' E 9 *
Clematis texensis 'Queen Maxima' E 9 *
Clematis texensis 'Radiance' E 9 *
Clematis texensis 'Wellmax' J 9
Clematis texensis 'Wyevale' E 9 *
Clematis texensis x pitcherii ? 9 *
Clematis The President' L 9
Clematis tibetana J 9
Clematis tibetana subsp. vernayi 'Orange Peel' J 9
Clematis tibetana var. vernayi J 9
Clematis Titipu' A 9
Clematis tubulosa 'Wyevale' J 9
Clematis urophylla ?
Clematis veitchiana C 9
Clematis Venosa Violacea' E 9
Clematis versicolor L 9
Clematis Victoria' G 9
Clematis Ville de Lyon' L 9
Clematis vinacea A
Clematis viorna A 9
Clematis viorna 'Boone County' A 9
Clematis viorna 'Buckland Beauty' A 9
Clematis viorna 'Garnet' A 9
Clematis viorna hybrid A 9
Clematis virginiana A 3 4
Clematis vitalba E 9
Clematis viticella E 9
Clematis viticella 'Abundance' E 9
Clematis viticella 'Alba Luxurians' E 9
Clematis viticella 'Betty Corning' E 9
Clematis viticella 'Carmencita' E 9
Clematis viticella 'Etoile Violette' E 9
Clematis viticella 'Hagelby Pink' E 9
Clematis viticella 'Hagelby White' E 9
Clematis viticella 'Kermesina' E 9
Clematis viticella 'Minuet' E 9
Clematis viticella 'Venosa Violacea' E 9
Clematis viticella 'Zolibe' E 9
Clematis viticella hybrid E 9
Clematis viticella subsp. campaniflora E 9
Clematis White Swan' B 9
Clematis Willy' D 9
Clematis x 'Fuji Kahori' ?
Clematis x cartmanii A
Clematis x cylindrica 'Millie' L 9
Clematis x diversifolia 'Rouguchi' A
Clematis x durandii ? 9
Clematis x eriostemon C 9
Clematis x eriostemon 'Blue Boy' C 9
Clematis x eriostemon 'Hendersonii ' C 9
Clematis x hybrida sieboldii 'Ramona ' L 9
Clematis x jouiniana J
Clematis x jouiniana 'Praecox' J
Clematis x Toki ?
Clematis Yukikomachi' L 9
Clematopsis scabiosifolia A
Cleome chilensis A *
Cleome dodecandra A
Cleome hassleriana A 3
Cleome hassleriana 'Cherry Queen' A *
Cleome hassleriana 'Helen Campbell' A 3
Cleome hassleriana 'Purple Queen' A *
Cleome hassleriana 'Rose Queen' A 3
Cleome houtteana A 3
Cleome houtteana 'Sparkler Rose' A 3
Cleome hybrid A 3 *
Cleome obliqua A 3 *
Cleome rutidosperma A 4 *
Cleome sp. A 3 *
Cleome spinosa A *
Clethra acuminata A *
Clethra alnifolia G 3
Clethra alnifolia 'Ruby Spice' G 3
Clethra barbinervis A
Clianthus formosus A 2 6 7
Clinopodium nepeta B
Clinopodium nepeta 'Marvelette Blue' A 3
Clinopodium thymifolium D 3 4
Clintonia borealis ! L 8 *
Clintonia uniflora ! L 8 *
Clitoria ternatea A 6 7
Clivia caulescens ! A *
Cnicus benedictus A
Cnidium dubium A 3
Cobaea scandens A
Codonopsis all species !
Codonopsis bhutanica B 3
Codonopsis cardiophylla F *
Codonopsis clematidea ! A 3
Codonopsis forrestii A
Codonopsis grey-wilsonii A
Codonopsis lanceolata B 3
Codonopsis obtusa ! A 3
Codonopsis ovata A
Codonopsis pilosa A 3
Codonopsis pilosula A
Codonopsis rotundifolia A 3
Codonopsis sp. A
Codonopsis tangshen B 3
Codonopsis tubulosa A 3
Codonopsis ussuriensis B 3
Colchicum arenarium ! L *
Colchicum autumnale ! L *
Colchicum bivonae ! L *
Colchicum diampolis ! L *
Colchicum hungaricum ! L *
Colchicum kurdicum ! L *
Colchicum sp. ! L *
Colchicum speciosum ! L *
Colchicum szovitsii ! L 4 *
Coleostephus multicaulis A
Coleus scutellarioides 'Palisandra' A
Collomia biflora A
Collomia coccinea A
Collomia debilis A 5
Collomia grandiflora F
Colutea arborescens A 7
Colutea orientalis A 6 7
Colutea x media A 2 6
Coluteocarpus vesicaria A
Coluteocarpus vesicaria subsp. vesicaria A 2
Commelina coelestis A 2
Commelina dianthifolia A
Commelina tuberosa A *
Compositae sp. ?
Comptonia peregrina ! A 6 7 *
Conoclinium coelestinum J
Conopholis americana *
Conopodium denudatum A
Conopodium majus A
Consolida ajacis A
Consolida ambigua A 1
Consolida cultivar A 1
Consolida regalis A
Consolida sp. A
Convallaria majalis A 2 8
Convallaria majalis 'Albostriata ' A 2 8
Convallaria majalis 'Rubra' L 2 8
Convallaria majalis 'Variegata' A 2 8
Convolvulus sp. A 6 7
Convolvulus assyricus A 7
Convolvulus nitidus A 7
Convolvulus tricolor A 7
Conyza nana A
Coprosma petriei H
Coptis groenlandica ! K *
Coptis trifolia ! K *
Coptis trifolia subsp. groenlandica ! K *
Corallodiscus sp. ?
Coreopsis 'Red Satin' ?
Coreopsis 'Cosmic Eye' A
Coreopsis 'Sterntaler' A
Coreopsis auriculata 'Nana' A
Coreopsis auriculata 'Zamphir' A
Coreopsis grandiflora A
Coreopsis grandiflora 'Double the Sun' A
Coreopsis grandiflora 'Early Sunrise' A
Coreopsis hybrid K
Coreopsis hybrida K
Coreopsis lanceolata A
Coreopsis leavenworthii A 3
Coreopsis rosea F
Coreopsis rosea 'American Dream' F
Coreopsis sp. K
Coreopsis tinctoria A 3
Coreopsis tripteris B 3
Coreopsis verticillata K
Coreopsis verticillata 'Moonbeam' K
Coreopsis x hybrida K
Coreopsis x hybrida 'Incredible Tall' A
Coriandrum sativum A 1
Coriandrum sativum 'Calypso' A
Cornus alternifolia ! L *
Cornus canadensis G 5 8 *
Cornus capitata ! L *
Cornus florida H 2 8 *
Cornus florida 'Rainbow' H 2 8 *
Cornus kousa H 8 *
Cornus kousa 'Miss Satomi' H 8 *
Cornus kousa 'Milky Way' H 8 *
Cornus kousa 'Satomi' H 8 *
Cornus kousa 'Wolf Eyes' H 8 *
Cornus kousa var. chinensis 'China Girl' H 8 *
Cornus kousa var. chinensis 'Satomi' H 8 *
Cornus mas G 8 *
Cornus mas 'Variegata' G 8 *
Cornus most species *
Cornus racemosa H 8 *
Cornus rugosa H 8 *
Cornus rugosa f. variegata H 8 *
Cornus stolonifera D *
Coronilla cappadocica ! E *
Coronilla minima J 6 7
Coronilla orientalis ! E *
Coronilla vaginalis J 6 7
Cortaderia richardii J
Cortusa altaica A
Cortusa matthioli A
Cortusa matthioli 'Alba' A
Cortusa matthioli subsp. altaica A
Cortusa matthioli subsp. pekinensis A
Cortusa matthioli subsp. turkestanica A
Cortusa turkestanica A
Corydalis adunca ! ?
Corydalis alba ! 3 *
Corydalis angustifolia ! L 3
Corydalis aurea ! L
Corydalis blanda subsp. parnassica ! 3 *
Corydalis cava ! D
Corydalis cava 'Albiflora ' ! E *
Corydalis cheilanthifolia ! A
Corydalis densiflora ! E *
Corydalis flexuosa ! L
Corydalis heterocarpa ! E *
Corydalis intermedia ! C *
Corydalis linstowiana ! A 3
Corydalis lutea ! C *
Corydalis magadanica ! L
Corydalis malkensis ! L
Corydalis nobilis ! L *
Corydalis ochroleuca ! A 3 *
Corydalis ophiocarpa ! L
Corydalis paczoskii ! L
Corydalis parnassica ! 3 *
Corydalis raddeana ! ?
Corydalis saxicola ! L
Corydalis scouleri ! 3 *
Corydalis sempervirens ! A 3 *
Corydalis shanginii ! L 3
Corydalis solida ! E *
Corydalis solida 'Merlin' ! E *
Corydalis solida f. transsylvanica 'George Baker' ! E *
Corydalis solida subsp. densiflora ! E *
Corydalis solida subsp. solida ! E *
Corydalis sp. ! L
Corydalis transsylvanica ! E
Corydalis tuberous - all species ! *
Corydalis turtschaninovii ! E
Corydalis wilsonii A
Corydalis zetterlundii ! L *
Corylopsis glabrescens D *
Corylus americana L 7 *
Corylus avellana 7 *
Corymbia citriodora G
Corymborkis veratrifolia *
Coryphantha sulcata A
Cosmidium burridgeanum 'Phillipine' K
Cosmos bipinnatus A
Cosmos bipinnatus 'Diablo' A
Cosmos bipinnatus 'Psyche' A
Cosmos bipinnatus 'Purity' A
Cosmos bipinnatus 'Rubenza' A
Cosmos bipinnatus 'Sea Shells' A
Cosmos bipinnatus 'Xanthos' A
Cosmos hybrid A
Cosmos Sensation series A
Cosmos sp. A
Cosmos sulphureus A
Cosmos sulphureus 'Bright Lights' A
Cosmos sulphureus 'Cosmic Orange' A
Cosmos sulphureus 'Mona's Orange' A
Cosmos sulphureus 'Mona's Orange' A
Cosmos sulphureus 'Sunset Orange' A
Cota tinctoria A
Cotinus coggygria 'Golden Spirit' L
Cotinus coggygria 'Young Lady' L
Cotinus sp. L
Cotoneaster acutifolius L 6
Cotoneaster dielsianus D 3 6 7
Cotoneaster divaricatus D
Cotoneaster horizontalis F 6 7
Cotoneaster integerrimus 6 7 * *
Cotula hispida A
Cotyledon orbiculata A
Cotyledon simplicifolia A
Crambe abyssinica L
Crambe cordifolia A 3
Crambe maritima F
Crambe orientalis A
Craspedia globosa A 3
Crassula orbicularis A
Crassula sediodes A
Crassula sp. A
Crataegus crus-galli E
Crataegus laevigata 'Paul's Scarlet' D
Crataegus maximowiczii G 6
Crataegus pinnatifida H *
Crataegus sp. D 6 8 *
Cremanthodium arnicoides A
Crepis aurea A
Crepis incana F *
Crepis nana L
Crepis rubra A
Crepis rubra 'Snow White' A 3
Crocosmia 'Prince of Orange' A
Crocosmia Emberglow' A
Crocosmia Emily Mackenzie' A
Crocosmia hybrid A
Crocosmia John Boots' A
Crocosmia Lucifer' A
Crocosmia paniculata ! A
Crocosmia sp. K
Crocosmia Walcroy' A
Crocosmia x crocosmiiflora ! A
Crocosmia x crocosmiiflora 'George Davison' A
Crocosmia x crocosmiiflora 'Star of the East' A
Crocus angustifolius' Minor' L *
Crocus banaticus L *
Crocus biflorus subsp. alexandri L *
Crocus boryi ! L *
Crocus byzantinus L *
Crocus flavus subsp. flavus L *
Crocus fleischeri L *
Crocus Herald' L *
Crocus heuffelianus L *
Crocus iridiflorus L *
Crocus Jeanne d' Arc' L *
Crocus kotschyanus L *
Crocus macedonicus L *
Crocus minimus L *
Crocus nudiflorus L *
Crocus Princess Beatrix' L *
Crocus pulchellus L *
Crocus sativus var. cashmerianus L *
Crocus serotinus subsp. salzmannii L *
Crocus sp. L *
Crocus speciosus L *
Crocus speciosus 'Conqueror' L *
Crocus Striped Beauty' L *
Crocus tommasinianus L *
Crocus vallicola L *
Crocus vernus L *
Cryptantha sp. ! *
Cryptotaenia japonica D 2
Cryptotaenia japonica f. atropurpurea D 2
Cucubalus baccifer A
Cucumis sativus A
Cucumis sativus 'Crystal Apple' A
Cuphea procumbens K *
Cuphea sp. A
Cuphea viscosissima A
Cuphea x purpurea 'Firefly' A
Cupressus x leylandii 'Castwellen Gold' ?
Cupressus arizonica var. glabra J
Cupressus forbesii *
Cupressus sempervirens K
Cyananthus lobatus A
Cyanus cheiranthifolius A
Cyanus montanus A
Cyanus pindicola A
Cyanus segetum A
Cyclamen adzharicum A 2 7 *
Cyclamen africanum A 2 7 *
Cyclamen all species A 2 7 *
Cyclamen balearicum A 2 7 *
Cyclamen cilicium A 2 7 *
Cyclamen cilicium f. album A 2 7 *
Cyclamen coum A 2 7 *
Cyclamen coum 'Maurice Dryden' A 2 7 *
Cyclamen coum subsp. caucasicum A 2 7 *
Cyclamen coum subsp. coum A 2 7 *
Cyclamen graecum A 2 7 *
Cyclamen hederifolium A 2 7 *
Cyclamen hederifolium 'Album' A 2 7 *
Cyclamen hederifolium 'Bowles Apollo' A 2 7 *
Cyclamen hederifolium 'Rosenteppich' A 2 7 *
Cyclamen hederifolium 'Ruby Glow' A 2 7 *
Cyclamen intaminatum A 2 7 *
Cyclamen libanoticum A 2 7 *
Cyclamen mirabile A 2 7 *
Cyclamen neapolitanum A 2 7 *
Cyclamen persicum cultivar A 2 7 *
Cyclamen purpurascens A 2 7 *
Cyclamen purpurascens subsp. purpurascens A 2 7 *
Cyclamen repandum A 2 7 *
Cyclamen repandum subsp. rhodense A 2 7 *
Cyclanthera pedata A
Cydonia oblonga *
Cymbalaria aequitriloba A
Cymbalaria muralis A 3
Cynara cardunculus A
Cynara sp. A
Cynoglossum amabile A 3
Cynoglossum coelestinum A
Cynoglossum creticum A
Cynoglossum nervosum A
Cynoglossum officinale L 6
Cynoglossum sp. L
Cynoglossum zeylanicum A 2
Cypella caerulea A
Cypella coelestis A
Cypella herbertii ! K
Cypella sp. A
Cyperus involucratus A *
Cyperus papyrus A 3
Cyperus sp. J
Cypripedium acaule A 3 *
Cypripedium calceolus A 3 *
Cypripedium calceolus var. parviflorum A 3 *
Cypripedium calceolus var. pubescens A 3 *
Cypripedium candidum A 3 *
Cypripedium macranthos A 3 *
Cypripedium parviflorum A 3 *
Cypripedium parviflorum v. parviflorum A 3 *
Cypripedium pubescens A 3 *
Cypripedium reginae A 3 *
Cypripedium sp. A 3 *
Cyrtanthus brachysiphon A
Cyrtanthus elatus ! *
Cystopteris fragilis A *
Cytisus austraicus A 1 3 6 7
Cytisus austriacus subsp. pygmaeus A 1 6 7 *
Cytisus decumbens A 6 7 *
Cytisus hirsutus A 1 6 7
Cytisus praecox L 6 7 *
Cytisus procumbens A 6 7 *
Cytisus purpureus A 1 6 7 *
Cytisus ratisbonensis A 1 6 7
Cytisus ruthenicus A 1 6 7 *
Cytisus sp. L 6 7 *
Cytisus Vancouver Gold' J 6 7 *
Daboecia cantabrica f. alba A 3
Dactylicapnos macrocapnos ! B
Dactylicapnos scandens ! B
Dactylicapnos torulosa ! E *
Dactylorhiza elata A *
Dactylorhiza fuchsii A *
Dactylorhiza maculata A *
Dactylorhiza purpurella *
Dahlia merckii A
Dalea candida A
Dalea gattingeri A 7
Dalea purpurea A 6 7
Dalea sp. A
Daphne albowiana ! D 6 8
Daphne all species ! *
Daphne alpina ! D 6 8
Daphne altaica ! H 6 8
Daphne caucasica ! H 6 8
Daphne cneorum ! G 6 8
Daphne domini ! G 6 8
Daphne feddei ! H 6 8
Daphne giraldii ! D 6 8 *
Daphne hybrid ! H 6 8 *
Daphne kiusiana ! G 6 8
Daphne kosaninii ! G 6 8
Daphne laureola ! H 6 8
Daphne laureola subsp. philippi ! H 6 8
Daphne longilobata ! L 6 8 *
Daphne mezereum ! H 6 8
Daphne mezereum f. alba ! H 6 8
Daphne mezereum var. rubrum ! H 6 8
Daphne oleoides ! A 6 8 *
Daphne oleoides var. glandulosa ! A 6 8 *
Daphne pontica ! L 3 6 8 *
Daphne pontica subsp. haematocarpa ! D 6 8
Daphne reichsteinii ! L 6 8
Daphne sp. ! H 6 8 *
Daphne tangutica ! J 6 8
Darmera peltata E 7
Dasiphora fruticosa A
Datisca cannabina B
Datura Ballerina Purple' A
Datura bernhardii A 4
Datura discolor A 6 7
Datura innoxia A
Datura metel A
Datura metel 'Belle Blanche' A
Datura metel 'Black Currant Swirl' A
Datura metel 'La Fleur Lilac' A
Datura meteloides D
Datura sp. A
Datura stramonium A 3
Daucus carota 'Dara' A
Daucus carota subsp. maximus A
Decaisnea insignis G 6 7
Degenia all species A
Degenia velebitica L
Deinanthe bifida A 3
Deinanthe caerulea A 3
Delosperma Allan's Apricot' A 3
Delosperma ashtonii A
Delosperma basuticum A 3
Delosperma brunnthaleri A
Delosperma congestum A
Delosperma cooperi A
Delosperma cooperi 'Candystone' A
Delosperma hirtum A 3
Delosperma Mountain Fire' A 3
Delosperma nelii A
Delosperma Red Mountain? Flame A
Delosperma sp. A
Delphinium 'Pacific Giants' A
Delphinium ajacis J
Delphinium ajacis 'QIS Dark Blue' A
Delphinium all species *
Delphinium alpinum J
Delphinium ambiguum A
Delphinium anthriscifolium A
Delphinium Astolat Group J
Delphinium barbeyi J
Delphinium belladonna J
Delphinium Belladonna Group A
Delphinium Blue Fountains Group J
Delphinium Blue Mirror' J
Delphinium brunonianum ! G *
Delphinium bulleyanum J
Delphinium caeruleum ! K *
Delphinium carolinianum H
Delphinium cashmerianum A
Delphinium caucasicum L
Delphinium consolida ! A
Delphinium decorum J
Delphinium elatum ! J
Delphinium elatum Millennium Hybrids A
Delphinium exaltatum K
Delphinium fissum G 2
Delphinium Galahad' J
Delphinium glaucum C
Delphinium grandiflorum J
Delphinium grandiflorum 'Blue Butterfly' J
Delphinium grandiflorum 'Blue Elf' J
Delphinium grandiflorum 'Blue Pygmy' J
Delphinium grandiflorum 'Sky Blue' J
Delphinium grandiflorum 'Summer Blues' J
Delphinium grandiflorum 'Summer Morning' J
Delphinium grandiflorum 'Summertime Blues' J
Delphinium grandiflorum f. album J
Delphinium grandiflorum var. chinense J
Delphinium hybrid J
Delphinium likiangense A
Delphinium Magic Fountains series K
Delphinium menziesii A *
Delphinium novomexicanum A
Delphinium nudicaule J
Delphinium occidentale H
Delphinium oreophilum L
Delphinium oxysepalum A
Delphinium Pacific hybrid A
Delphinium Pacific hybrids A
Delphinium pylzowii F
Delphinium ramosum L
Delphinium semibarbatum A
Delphinium sp. J
Delphinium speciosum L
Delphinium Summer Skies Group J
Delphinium tatsienense A
Delphinium tricorne ! D *
Delphinium vestitum F
Delphinium zalil F
Dendranthema occidentali - japonense A 3
Derwentia perfoliata L
Deschampsia cespitosa A
Deschampsia cespitosa 'Pixie Fountain' A
Deschampsia flexuosa A
Desmanthus illinoensis A 5
Desmodium canadense A 6
Dianella tasmanica A 7 *
Dianthus 'Diana Lavender Picotee' A
Dianthus 'Diana' A
Dianthus 'Fire and Ice' A
Dianthus 'Magic Charms' mix A
Dianthus acicularis A
Dianthus all species A *
Dianthus Allwoodii Alpinus Group A
Dianthus alpinus B
Dianthus alpinus 'Joan's Blood' A
Dianthus alpinus x callizonus B
Dianthus amurensis A
Dianthus amurensis 'Siberian Blue' A
Dianthus andrzejowskianus A
Dianthus arenarius A
Dianthus arenarius 'Little Maiden' A
Dianthus arenarius ssp. bohemicus A
Dianthus arenarius ssp. borussicus A
Dianthus armeria A 3
Dianthus arpadianus A
Dianthus barbatus A
Dianthus barbatus 'Darkest of All' A
Dianthus barbatus 'Nigrescens' A 2
Dianthus barbatus 'Sooty' A
Dianthus barbatus 'Super Duplex Mixed' A
Dianthus barbatus 'Super Duplex' A
Dianthus barbatus Nigrescens Group A
Dianthus Baths Pink' A
Dianthus Berlin Snow' A
Dianthus Blue Hills' A
Dianthus brevicaulis A
Dianthus caesius A
Dianthus callizonus A
Dianthus campestris A
Dianthus capitatus A
Dianthus capitatus subsp. andrzejowskianus A
Dianthus carthusianorum A 2
Dianthus carthusianorum 'Nanus' A 2
Dianthus carthusianorum var. humilis A 2
Dianthus caryophyllus A 2
Dianthus caucasicus A
Dianthus Chianti' A
Dianthus chinensis A
Dianthus chinensis 'Diana Crimson Picotee' A
Dianthus chinensis 'Purple Picotee' A
Dianthus crinitus A
Dianthus cruentus A
Dianthus deltoides A
Dianthus deltoides 'Albus' A
Dianthus deltoides 'Brilliant' A
Dianthus deltoides 'Fire and Ice' A
Dianthus deltoides 'Flashing Light' A
Dianthus deltoides 'Leuchtfunk' A
Dianthus deltoides 'Nelli' A
Dianthus deltoides 'Shrimp' A
Dianthus erinaceus A
Dianthus erinaceus var. alpinus A
Dianthus ferrugineus A
Dianthus fischeri A *
Dianthus fragrans A
Dianthus freynii A
Dianthus furcatus J
Dianthus giganteiformis subsp. pontederae A
Dianthus giganteus A
Dianthus glacialis A
Dianthus glacialis subsp. gelidus A
Dianthus glomeratus var. acaulis A
Dianthus gracilis A
Dianthus gratianopolitanus A 2
Dianthus gratianopolitanus 'Badenia' A 2
Dianthus gratianopolitanus 'Sternkissen' A 2
Dianthus haematocalyx A
Dianthus haematocalyx ssp. ventricosus A
Dianthus haematocalyx subsp. pinidicola A
Dianthus hungaricus A
Dianthus hybrid A
Dianthus hyssopifolius A
Dianthus Inshriach Dazzler' A
Dianthus knappii A
Dianthus La Bourboule' A
Dianthus leucophaeus A 2
Dianthus Little Jock' A
Dianthus Loveliness' A
Dianthus lumnitzeri A
Dianthus lusitanus A
Dianthus microlepis A
Dianthus Minimounds' A
Dianthus monspessulanus A
Dianthus monspessulanus subsp. sternbergii A
Dianthus Mountain Mist' A
Dianthus Mrs Holt' A
Dianthus myrtinervius A
Dianthus myrtinervius subsp. caespitosus A
Dianthus nardiformis A
Dianthus nitidus A
Dianthus noeanus A
Dianthus parnassicus A
Dianthus pavonius A
Dianthus pavonius var. neglectus ?
Dianthus petraeus subsp. noeanus A
Dianthus petraeus var. orbelicus A
Dianthus plumarius A
Dianthus plumarius 'Fruhlingswonne' A
Dianthus plumarius subsp. blandus A
Dianthus pontederae A
Dianthus pungens 'Tight Blue' A
Dianthus Rachel' A
Dianthus Rainbow Loveliness' A
Dianthus repens A
Dianthus rock garden mix A
Dianthus seguieri A
Dianthus serotinus A
Dianthus shinanensis A
Dianthus simulans A
Dianthus sp. A
Dianthus spiculifolius A
Dianthus squarrosus A
Dianthus sternbergii A
Dianthus subacaulis A
Dianthus subacaulis 'Tight Blue' A
Dianthus subacaulis subsp. brachyanthus A
Dianthus superbus A
Dianthus superbus 'Crimsonia' A
Dianthus superbus var. longicalycinus A
Dianthus sylvestris A
Dianthus sylvestris subsp. sylvestris A
Dianthus sylvestris subsp. tergestinus A
Dianthus tenuifolius A
Dianthus tergestinus A
Dianthus uralensis A
Dianthus versicolor A
Dianthus viscidus A
Dianthus webbianus A
Dianthus weyrichii A
Dianthus Whatfield Mini' A
Dianthus Whatfield White' A
Dianthus zonatus A
Diapensia lapponica E
Diarrhena japonica L
Diascia Ruby Field' A
Diascia sp. A
Dicentra cucullaria ! E *
Dicentra eximia ! E *
Dicentra eximia 'Alba' ! E *
Dicentra eximia 'Snowdrift' ! E *
Dicentra formosa ! E *
Dicentra formosa 'Bacchanal' ! E *
Dicentra hybrid ! E *
Dicentra oregona ! E *
Dicentra pauciflora ! E *
Dicentra peregrina ! E *
Dicentra scandens ! E *
Dicentra sp. ! E *
Dicentra spectabilis ! E *
Dicentra spectabilis 'Alba' ! E *
Dicentra spectabilis 'Valentine' ! E *
Dicentra Stuart Boothman' ! E *
Dicentra Sweetheart' ! E *
Dicentra torulosa ! E *
Dichromena colorata A *
Dicranostigma franchetianum A
Dicranostigma lactucoides A
Dicranostigma leptopodum J
Dictamnus albus ! J
Dictamnus albus 'Albiflorus' ! J
Dictamnus albus 'Purpureus' ! J
Dictamnus albus 'Rosea' ! G
Dictamnus albus 'Rubra' ! G
Dictamnus albus var. albus ! G
Dictamnus albus var. fraxinella ! G
Dictamnus albus var. purpureus ! J
Dictamnus albus var. roseus ! G
Dictamnus fraxinella ! G
Dierama igneum A
Dierama pulcherrimum B
Diervilla lonicera A 3
Diervilla x splendens A
Dietes iridioides A
Digiplexis Illumination Flame' *
Digitalis alba A
Digitalis ambigua A 3
Digitalis ciliata A
Digitalis davisiana A 3
Digitalis dubia F
Digitalis ferruginea A
Digitalis ferruginea 'Gelber Herold' A
Digitalis ferruginea 'Gigantea Gelber Herold' A
Digitalis ferruginea 'Gigantea' A
Digitalis grandiflora A
Digitalis grandiflora 'Carillon' A
Digitalis grandiflora 'Dropmore Yellow' A
Digitalis grandiflora 'Temple Bells' A
Digitalis hybrid A
Digitalis John Innes Tetra' A
Digitalis laevigata A
Digitalis lamarckii J
Digitalis lanata A
Digitalis lutea A
Digitalis mertonensis A
Digitalis minor v. minor A
Digitalis nervosa A 3
Digitalis obscura A 3
Digitalis orientalis A 3
Digitalis parviflora A
Digitalis parviflora 'Milk Chocolate' A
Digitalis purpurea A
Digitalis purpurea 'Alba' A
Digitalis purpurea 'Apricot Beauty' A
Digitalis purpurea 'Apricot Faerie Queen' A
Digitalis purpurea 'Dalmatian Peach' A
Digitalis purpurea 'Dalmatian Purple' A
Digitalis purpurea 'Faerie Queen' A
Digitalis purpurea 'Pam's Choice' A
Digitalis purpurea 'Peloric' A
Digitalis purpurea 'Snow Thimble' A
Digitalis purpurea 'Sutton's Apricot' A
Digitalis purpurea (Excelsior Group) A
Digitalis purpurea (Foxy Group) A
Digitalis purpurea f. alba A
Digitalis purpurea f. albiflora A
Digitalis purpurea subsp. heywoodii 'Pink Champagne' A
Digitalis purpurea var. albiflora A
Digitalis purpurea var. mariana A
Digitalis schischkinii A
Digitalis sp. A 3
Digitalis stewartii A 3
Digitalis thapsi A
Digitalis thapsi 'Spanish Peaks' A
Digitalis trojana A
Digitalis viridiflora A 2
Digitalis x fulva A
Digitalis x mertonensis A
Digitalis x sibirica A 3
Dioscorea caucasica L *
Dioscorea batatas A 2
Dioscorea japonica A
Dioscorea villosa A
Diospyros virginiana G 8
Diphylleia cymosa ! H
Diplazium pycnocarpon A
Diplotaxis tenuifolia A
Dipsacus fullonum A 3
Dipsacus japonicus J
Dipsacus laciniatus ! A
Dipsacus pilosus A 3
Dipsacus sativus A
Dipsacus strigosus H 2
Disanthus cercidifolius ?
Discopleura capillacea A
Disporum cantoniense C 7
Disporum hookeri H 3 8
Disporum lutescens A 3
Disporum maculatum D
Disporum sessile 'Variegatum' ! G *
Disporum uniflorum ! L 3
Dodecatheon alpinum A 3
Dodecatheon amethystinum G
Dodecatheon clevelandii A 3
Dodecatheon conjugens F
Dodecatheon dentatum F
Dodecatheon hendersonii ! J
Dodecatheon hendersonii 'Sooke' ! J
Dodecatheon jeffreyi G
Dodecatheon meadia F *
Dodecatheon meadia 'Aphrodite' G
Dodecatheon meadia f. album F *
Dodecatheon pulchellum A 2 *
Dodecatheon pulchellum 'Sooke Variety' A 2 *
Dodecatheon pulchellum subsp. pulchellum 'Red Wings' A 2 *
Dodecatheon redolens F
Dodecatheon sp. ! L
Dodecatheon tetrandum G
Dodonaea viscosa A
Dodonaea viscosa 'Purpurea' A
Doellingeria umbellata A
Doronicum austriacum A
Doronicum clusii A 3
Doronicum columnae A
Doronicum grandiflorum L
Doronicum hungaricum A
Doronicum Little Leo' A
Doronicum orientale A
Doronicum orientale 'Little Leo' A
Doronicum orientale 'Magnificent' A
Doronicum pardalianches A 3
Doronicum species A *
Dorycnium hirsutum A
Dorycnium rectum A 6
Douglasia laevigata L
Douglasia montana ! L
Draba acaulis G
Draba aizoides A 3
Draba all species *
Draba alpina var. glacialis A
Draba altaica G
Draba alticola K
Draba arabisans A 3
Draba arabisans var. canadensis A 3
Draba archibaldii B
Draba aspera A
Draba athoa A
Draba bertolonii A
Draba borealis A
Draba breweri A
Draba breweri var. cana A
Draba bruniifolia A
Draba bruniifolia subsp. olympica A
Draba bruniifolia subsp. olympica var. lanata A
Draba bryoides L
Draba bryoides var. imbricata F
Draba cappadocica A
Draba compacta A
Draba cretica A
Draba cusickii A
Draba cuspidata A 3
Draba darwasica A
Draba dedeana F
Draba densifolia A
Draba fladnizensis J
Draba haynaldii J
Draba hispanica A 3
Draba hoppeana A
Draba incerta F
Draba kitadakensis A
Draba klasterskyi A
Draba korabensis A 3
Draba kotschyi A 3
Draba lanceolata A
Draba lasiocarpa A
Draba loiseleurii A 3
Draba longisiliqua A 3
Draba magellanica A
Draba mollissima A
Draba most species A *
Draba nivalis A 3
Draba norvegica A
Draba oligosperma A 3
Draba parnassica A
Draba paysonii A 3
Draba polytricha A
Draba pyrenaica A
Draba ramosissima A 3
Draba rigida A 3
Draba rigida var. bryoides A 3
Draba rosularis A 3
Draba sakuraii A 3
Draba sauteri J
Draba shiroumana A
Draba simonkaiana A
Draba sp. A 3
Draba sphaeroides A 3
Draba sphaeroides var. cusickii A 3
Draba stellata K
Draba subalpina A
Draba thymbriphyrestus J
Draba tomentosa A
Draba ussuriensis A 3
Draba ventosa A 3
Dracocephalum argunense F
Dracocephalum argunense 'Album' F
Dracocephalum argunense 'Fuji White' F
Dracocephalum argunense var. japonicum F
Dracocephalum austriacum A
Dracocephalum botryoides A
Dracocephalum calophyllum A
Dracocephalum calophyllum var. smithianum A
Dracocephalum foetidum A
Dracocephalum forrestii A
Dracocephalum grandiflorum A
Dracocephalum hemsleyanum J
Dracocephalum imberbe A
Dracocephalum isabellae A
Dracocephalum moldavica A
Dracocephalum nutans A
Dracocephalum palmatum A
Dracocephalum renati A
Dracocephalum rupestre A
Dracocephalum ruyschiana J
Dracocephalum sp. J
Dracocephalum tanguticum A
Dracocephalum wendelboi A
Dracunculus vulgaris A 8 *
Dregea sinensis ! A
Drosera filiformis J *
Drosera intermedia L *
Drosera linearis J *
Drosera rotundifolia A
Dryas drummondii ! A
Dryas grandis L
Dryas hybrid ? A
Dryas integrifolia J
Dryas octopetala J
Dryas octopetala 'Minor' J
Dryas octopetala var. integrifolia J
Dryas suendermanni A
Dryas x suendermanni A
Drymocallis corsica A 3
Drymocallis arguta ? A
Drymocallis rupestris A 3
Dryomocallis rupestris A 3
Dudleya pulverulenta A
Duranta erecta 'Sapphire Showers' A
Duranta species A
Dysosma pleiantha ! G *
Dysosma veitchii ! J *
Dystaenia ibukiensis ?
Eccremocarpus scaber F 3
Eccremocarpus scaber 'Ruber' F 3
Echeveria hybrid A
Echeveria shaviana 'Pink Frills' A
Echinacea 'Hot Papaya' A
Echinacea 'Supreme Cantaloupe' A
Echinacea angustifolia A
Echinacea Cheyenne Spirit' A
Echinacea Green Envy' A
Echinacea Julia' A
Echinacea Leilani' A
Echinacea pallida A
Echinacea pallida 'Hula Dancer' A
Echinacea paradoxa A
Echinacea Pow Wow Wild Berry' A
Echinacea purpurea A
Echinacea purpurea ''Primadonna Deep Rose' A
Echinacea purpurea 'Alba' A
Echinacea purpurea 'Baby Swan Pink' A
Echinacea purpurea 'Baby Swan White' A
Echinacea purpurea 'Baby Swan White' A
Echinacea purpurea 'Bright Star' A
Echinacea purpurea 'Doppelganger' A
Echinacea purpurea 'Double Decker' A
Echinacea purpurea 'Fatal Attraction' A
Echinacea purpurea 'Jade' A
Echinacea purpurea 'Kim's Knee High' A
Echinacea purpurea 'Magnus' A
Echinacea purpurea 'Pow Wow Wild Berry' A
Echinacea purpurea 'Primadonna White' A
Echinacea purpurea 'Robert Bloom' A
Echinacea purpurea 'Ruby Giant' A
Echinacea purpurea 'Ruby Star' A
Echinacea purpurea 'The King' A
Echinacea purpurea 'White Lustre' A
Echinacea purpurea 'White Swan' A
Echinacea purpurea PowWow Series A
Echinacea Sombrero Salsa Red' A
Echinacea Sombrero Series A
Echinacea sp. G
Echinacea Sunrise' (big Sky Series) A
Echinacea tennesseensis A *
Echinacea x hybrida A
Echinocystis lobata L
Echinops bannaticus A
Echinops bannaticus 'Blue Glow' A
Echinops bannaticus 'Star Frost' A
Echinops exaltatus A
Echinops ritro A
Echinops ritro 'Alba' A
Echinops ritro 'Veitch's Blue' A
Echinops ritro subsp. ruthenicus A
Echinops ruthenicus A
Echinops sp. A
Echinops sphaerocephalus A 2
Echinops sphaerocephalus 'Arctic Glow' A 2
Echinops spinosissimus subsp. spinosissimus A
Echinospartum horridum A 1 6 7 *
Echium amoenum A
Echium gentianoides A
Echium lycopsis A
Echium plantagineum A
Echium russicum A
Echium russicum 'Red Feathers' A
Echium sp. ?
Echium vulgare A
Echium vulgare 'Blue Bedder' F
Edraianthus dalmaticus A
Edraianthus dalmaticus 'Albus' A
Edraianthus dinaricus L
Edraianthus graminifolius A
Edraianthus horvatii L
Edraianthus niveus A
Edraianthus owerinianus J
Edraianthus parnassicus L *
Edraianthus pumilio A 3 *
Edraianthus serbicus A
Edraianthus serpyllifolius B
Edraianthus sp. A
Edraianthus tenuifolius A
Edraianthus tenuifolius 'Albus' A
Elaeagnus multiflora ! F *
Elaeagnus rhamnoides G 4
Eleocharis radicans ? *
Eleutherococcus senticosus D
Eleutherococcus sessiliflorus *
Elsholtzia ciliata A
Elsholtzia sp. A
Elsholtzia stauntonii A
Elymus elymoides J
Elymus glaucus A
Elymus hystrix A
Embothrium coccineum A 3
Embothrium coccineum (Lanceolatum Group) A 3
Emilia coccinea A
Emilia coccinea 'Scarlet Magic' A
Emilia sagittata A
Emilia sonchifolia A
Empetrum eamesii *
Empetrum nigrum L 5
Empetrum nigrum var. nigrum L 5
Empetrum pinnatum ! A
Enkianthus campanulatus A
Ephedra americana A
Ephedra chilensis ?
Ephedra equisetina A
Ephedra minima A 2
Ephedra minuta A
Ephedra monosperma A 2
Ephedra sp. L
Epilobium angustifolium A *
Epilobium angustifolium var. album A *
Epilobium canum subsp. garrettii A 3
Epilobium crissum A
Epilobium fleischeri L
Epilobium hirsutum A
Epilobium latifolium A 2
Epilobium luteum A 3 *
Epilobium obcordatum A
Epilobium sp. A
Epimedium grandiflorum 'Lilafee' ! L
Epimedium grandiflorum 'Purple Prince' ! A
Epimedium koreanum ! L
Epimedium pinnatum subsp. colchicum ! L
Epimedium pubigerum ! A
Epimedium x warleyense 'Orangekonigin' ! A
Epipactis helleborine A *
Epipactis latifolia A *
Epipactis sp. *
Eragrostis curvula A 3
Eragrostis spectabilis G
Eragrostis trichodes B 3
Eranthis cilicica ! C *
Eranthis hyemalis ! C *
Eranthis longistipitata ! C *
Eremogone hookeri A
Eremogone pseudacantholimon A
Eremurus 'Pinocchio' ! L *
Eremurus altaicus C
Eremurus bungei ! L *
Eremurus himalaicus ! L *
Eremurus hybrid ! L
Eremurus Moneymaker' ! L *
Eremurus robustus ! D *
Eremurus sp. ! L
Eremurus stenophyllus ! L *
Eremurus stenophyllus subsp. stenophyllus ! L *
Eremurus stenophyllus var. bungei ! L *
Eremurus tianschanicus F
Eremurus x isabellinus 'Cleopatra' L
Eremurus x isabellinus Ruiter hybrid L
Eremurus x isabellinus Shelford Hybrids L
Erianthus ravennae A
Erica tetralix K
Ericameria discoidea A
Ericameria nauseosa A
Erigeron 'Azurfee' A
Erigeron alpinus A
Erigeron atticus A
Erigeron aurantiacus A
Erigeron aureus A
Erigeron aureus 'Canary Bird' A
Erigeron austiniae A
Erigeron Azure Fairy' A
Erigeron borealis A
Erigeron caespitosus A
Erigeron chrysopsidis A
Erigeron chrysopsidis 'Grand Ridge' A
Erigeron chrysopsidis var. brevifolius A
Erigeron compactus A
Erigeron compositus A
Erigeron compositus var. dicoideus A
Erigeron compositus var. glabratus A
Erigeron consimilis A
Erigeron eatonii var. lavandulus A
Erigeron elegantulus A
Erigeron flettii A 2
Erigeron frigidus A
Erigeron glabellus A
Erigeron glaucus F
Erigeron glaucus 'Olga' F
Erigeron grandiflorus A
Erigeron heterochaeta A
Erigeron howellii A
Erigeron humilis L
Erigeron hungaricus A
Erigeron hybrid A
Erigeron hybridus A
Erigeron hyssopifolius A
Erigeron karvinskianus A 3
Erigeron leiomerus A
Erigeron linearis A
Erigeron nanus A
Erigeron oreganus A
Erigeron peregrinus A
Erigeron peregrinus ssp. callianthemus A
Erigeron pinnatisectus A
Erigeron pulchellus A
Erigeron pyrenaicus A
Erigeron radicatus A
Erigeron Rosa Juwel' A
Erigeron scopulinus A
Erigeron simplex A
Erigeron sp. A
Erigeron speciosus A
Erigeron speciosus 'Azure Fairy' A
Erigeron speciosus 'Azurfee' A
Erigeron subtrinervis A
Erigeron trifidus A
Erigeron uniflorus A
Erigeron ursinus A
Erigeron vagus A
Erigeron villarsii A
Erinus alpinus A 3
Erinus alpinus 'Carmineus' A 3
Erinus alpinus 'Dr. Hahnle' A 3
Erinus alpinus var. albus A 3
Eriogonum alatum A
Eriogonum androsaceum A
Eriogonum angustifolium A
Eriogonum caespitosum D
Eriogonum compositum A
Eriogonum heracleoides var. heracleoides A
Eriogonum jamesii A *
Eriogonum kennedyi var. kennedyi B 1
Eriogonum niveum G
Eriogonum ovalifolium G
Eriogonum umbellatum C 1 *
Eriogonum umbellatum v. majus A
Eriophorum angustifolium A 3 *
Eriophorum chamissonis E 7
Eriophorum russeolum E 7
Eriophorum scheuchzeri A 3
Eriophorum sp. ? 3
Eriophorum vaginatum A 3
Eriophorum virginicum ? *
Eriophyllum lanatum F *
Eriophyllum lanatum 'Pointe' F *
Eriophyllum lanatum var. integrifolium F *
Eritrichium canum A
Eritrichium kamtschaticum C
Eritrichium nanum var. elongatum ! A
Eritrichium pectinatum J
Eritrichium rupestre var. pectinatum J
Eritrichium sibiricum ?
Eritrichium villosum C
Erodium castellanum A
Erodium cedrorum subsp. cedrorum L
Erodium chrysanthum A
Erodium cygnorum A
Erodium glandulosum L
Erodium gruinum A
Erodium manescavi A
Erodium pelargoniflorum A
Erodium Wiliam Bishop' A
Eruca sativa A
Eruca vesicaria var. sativa A
Eryngium agavifolium B
Eryngium alpinum A
Eryngium alpinum 'Blue Star' A
Eryngium alpinum 'Superbum ' A
Eryngium amethystinum G
Eryngium aquaticum ! A
Eryngium aquaticum ! A
Eryngium aquifolium A
Eryngium aquifolium A
Eryngium bourgatii E *
Eryngium bourgatii 'Picos Blue' E
Eryngium caucasicum A
Eryngium giganteum E 1
Eryngium maritimum A
Eryngium pandanifolium E
Eryngium planum B
Eryngium planum 'Blaukappe' B
Eryngium planum 'Blue Glitter' B
Eryngium planum 'Blue Hobbit' B
Eryngium planum 'Tetra Petra' B
Eryngium planum 'Tiny Jackpot' B
Eryngium Sapphire Blue' B
Eryngium sp. L
Eryngium spinalba ! E
Eryngium tripartitum A
Eryngium variifolium J
Eryngium vesiculosum A
Eryngium x tripartitum A
Eryngium x zabelii 'Big Blue' ?
Eryngium yuccifolium F
Erysimum albescens A
Erysimum all species A
Erysimum allionii A
Erysimum alpinum J
Erysimum altaicum A
Erysimum amoenum A 3
Erysimum arenicola A
Erysimum bicolor A
Erysimum capitatum A 3
Erysimum carium A
Erysimum cheiri A
Erysimum cuspidatum A
Erysimum Ellen Willmott' ?
Erysimum helveticum A
Erysimum hieracifolium A
Erysimum hungaricum A
Erysimum kotschyanum A
Erysimum linifolium K
Erysimum marshallii A
Erysimum Moonlight' K
Erysimum nivale A 3
Erysimum Orange Flame' A
Erysimum pieninicum A
Erysimum sp. K
Erysimum sylvestre J
Erysimum wheeleri A
Erysimum wilczekianum J
Erysimum witmannii A
Erysimum wittmannii A
Erysimum x cheiri A
Erysimum x marshallii A
Erythronium americanum ! C
Erythronium californicum ! J
Erythronium caucasicum ! H 7 *
Erythronium dens-canis ! E *
Erythronium elegans ! L
Erythronium grandiflorum ! H *
Erythronium hendersonii ! L
Erythronium japonicum ! K 7 *
Erythronium Jeanette Brickell' ! L
Erythronium montanum ! H
Erythronium multiscapideum ! J
Erythronium oregonum ! E
Erythronium revolutum ! D
Erythronium species ! L
Erythronium tuolumnense 'Pagoda' ! L *
Eschscholzia caespitosa A 1
Eschscholzia caespitosa 'Sundew' A
Eschscholzia californica A
Eschscholzia californica 'Buttermilk' A
Eschscholzia californica 'Mission Bells' A
Eschscholzia californica 'Rosa Romantica' A
Eschscholzia californica 'Sunshine' A
Eschscholzia californica 'White Linen' A
Eschscholzia californica ((Thai Silk Series) A
Eschscholzia sp. A
Escobaria vivipara A *
Eucalyptus ambigua G *
Eucalyptus bridgesiana A
Eucalyptus citriodora G
Eucalyptus cordata A *
Eucalyptus gunnii A *
Eucalyptus nitida G *
Eucalyptus perriniana G *
Eucalyptus rodwayi G *
Eucalyptus subcrenulata G *
Eucalyptus urnigera A *
Eucalyptus vernicosa G *
Eucomis 'Aloha Kona' A 2
Eucomis 'Aloha Tiki' A 2
Eucomis autumnalis A 6 *
Eucomis bicolor A
Eucomis comosa A
Eucomis comosa 'Sparkling Burgundy' A
Eucomis Leia' A 2
Eucomis pallidiflora subsp. pole-evansii A
Eucomis pallidiflora subsp. pole-evansii A
Eucomis sp. A
Eucomis vandermerwei A
Euonymus angustifolius L
Euonymus atropurpureus D
Euonymus bungeanus L 8
Euonymus hamiltonianus H
Euonymus nanus var. turkestanicus J
Euonymus phellomanus L
Euonymus planipes F
Euonymus sachalinensis F
Euonymus sp. L
Eupatorium cannabinum A
Eupatorium dubium J 3
Eupatorium dubium 'Baby Joe' J 3
Eupatorium fistulosum A
Eupatorium fistulosum f. albidum A
Eupatorium fistulosum f. albidum 'Ivory Towers' A
Eupatorium lindleyanum A
Eupatorium maculatum A
Eupatorium perfoliatum A 3
Eupatorium purpureum A
Eupatorium rugosum A 3
Eupatorium rugosum 'Braunlaub' A 3
Eupatorium rugosum 'Chocolate' A 3
Eupatorium sp. K
Euphorbia cornigera A
Euphorbia corollata E
Euphorbia cyparissias E
Euphorbia griffithii E
Euphorbia lathyris A
Euphorbia leuconeura A
Euphorbia marginata A 1
Euphorbia myrsinites C 3
Euphorbia nicaeensis K
Euphorbia peplus A
Euphorbia polychroma A
Euphorbia schillingii A
Euphorbia sp. C
Eurybia divaricata A
Eurybia macrophylla G
Eurybia x herveyi 'Twilight' B
Eutrochium dubium G
Eutrochium dubium 'Baby Joe' G
Eutrochium dubium 'Little Joe' J
Eutrochium maculatum A
Eutrochium purpureum A
Exochorda korolkowii A
Exochorda The Bride' L
Exochorda x macrantha 'The Bride' L
Fagopyrum esculentum A
Fallopia Breaststroke' ?
Fallopia sp. ?
Fallugia paradoxa A
Fargesia nitida ! A *
Favratia zoysii L *
Felicia amelloides J
Felicia bergeriana A
Felicia heterophylla A
Felicia rosulata A
Felicia sp. ?
Felicia Tosca Blue' A
Ferula asafoetida L
Ferula assa-foetida L
Ferula communis A
Ferula glauca A
Ferula tingitana G *
Fessia greilhuberi A
Festuca amethystina A
Festuca gautieri A
Festuca gautieri 'Pic Carlit' A
Festuca glauca A
Festuca glauca 'Elijah Blue' A
Festuca ovina 'Glauca' A
Festuca valesiaca B
Fibigia all species A
Fibigia clypeata A
Fibigia macrocarpa A
Fibigia sp. A
Fibigia triquetra A 3
Filipendula camtschatica A
Filipendula digitata 'Nana' B
Filipendula glaberrima J
Filipendula hexapetala K
Filipendula koreana K
Filipendula multijuga B *
Filipendula palmata 'Nana' D
Filipendula palmata 'Rosea' D
Filipendula purpurea 'Elegans' A
Filipendula rubra ! E
Filipendula rubra 'Venusta' ! E
Filipendula ulmaria A 3
Filipendula ulmaria 'Aurea' A 3
Filipendula vestita ?
Filipendula vulgaris K
Filipendula vulgaris 'Flore Pleno' K
Filipendula vulgaris 'Plena' K
Filipendula vulgaris 'Variegata' K
Flueggea suffruticosa A
Foeniculum vulgare A
Foeniculum vulgare 'Purpurascens' A
Foeniculum vulgare 'Purpureum' A
Foeniculum vulgare 'Rubrum' A
Forestiera neomexicana G
Fothergilla major *
Fothergilla sp. *
Francoa ramosa A
Francoa sonchifolia A 2
Franklinia alatamaha ! J
Frasera speciosa E
Fraxinus chinensis subsp. rhynchophylla ! L
Fraxinus pennsylvanica C *
Freesia hybrids A 6
Freesia laxa A 3 *
Freesia laxa 'Joan Evans' A 3 *
Freesia laxa subsp. azurea A 3 *
Freesia species A 3 *
Fremontodendron californicum A 7
Fritillaria acmopetala ! G *
Fritillaria affinis ! L *
Fritillaria all species ! *
Fritillaria bithynica ! L *
Fritillaria bucharica ! L *
Fritillaria camschatcensis ! L *
Fritillaria caucasica ! L *
Fritillaria cirrhosa ! L *
Fritillaria collina ! J *
Fritillaria crassifolia subsp. kardiya ! L *
Fritillaria eduardii ! L *
Fritillaria forbesii ! L *
Fritillaria graeca ! L *
Fritillaria graeca subsp. thessala ! L *
Fritillaria imperialis ! H *
Fritillaria imperialis 'Aureomarginata' ! H *
Fritillaria imperialis 'Aurora' ! H *
Fritillaria imperialis 'Lutea' ! H *
Fritillaria kardiya ! L *
Fritillaria korolkowia ! L *
Fritillaria lusitanica ! L *
Fritillaria meleagris ! L *
Fritillaria meleagris 'Alba' ! L *
Fritillaria meleagris subsp. meleagris ! L *
Fritillaria messanensis ! L *
Fritillaria michailovskyi ! L *
Fritillaria montana ! L *
Fritillaria nervosa ! L *
Fritillaria nigra ! L *
Fritillaria orientalis ! L *
Fritillaria pallida ! L *
Fritillaria pallidiflora ! L *
Fritillaria persica ! L *
Fritillaria pontica ! L *
Fritillaria pyrenaica ! L *
Fritillaria raddeana ! L *
Fritillaria ruthenica ! L *
Fritillaria sewerzowii ! L *
Fritillaria stenanthera ! L *
Fritillaria tenella ! L *
Fritillaria thunbergii ! L *
Fritillaria walujewii ! L *
Fuchsia x bacillaris A 3
Gaillardia x grandiflora 'Arizona Apricot' A
Gaillardia ? grandiflora 'Kobold' A
Gaillardia aristata A
Gaillardia aristata 'Spintop Mango' A
Gaillardia grandiflora A
Gaillardia grandiflora A
Gaillardia mix A
Gaillardia Prairie Sun' A
Gaillardia pulchella A
Gaillardia pulchella 'Red Plume' A
Gaillardia pulchella 'Torch Red Ember' A
Gaillardia Red Plume' A
Gaillardia Royal Monarch Red' A
Gaillardia sp. A
Gaillardia x grandiflora 'Arizona Red Shades' A
Gaillardia x grandiflora 'Arizona Sun' A
Gaillardia x grandiflora 'Burgunder' A
Gaillardia x grandiflora 'Goblin' A
Gaillardia x grandiflora 'Kobold' A
Gaillardia x grandiflora 'Mesa Yellow' A
Gaillardia x grandiflora (Gallo Series) A
Galactites tomentosa A
Galanthus caucasicus ? *
Galanthus elwesii ! H *
Galanthus ikariae K
Galanthus nivalis ? *
Galanthus plicatus ? *
Galanthus woronowii K
Galax urceolata K
Galega officinalis A 3 *
Galega orientalis A
Galega trifoliata L *
Galeopsis speciosa G 2
Galium aparine A
Galium glaucum ?
Galium odoratum A
Galium tricornutum ! *
Galtonia candicans ! A 2
Galtonia viridiflora B
Gaultheria adenothrix G 3 8 *
Gaultheria fragrantissima G 3 8 *
Gaultheria procumbens A 3 8
Gaultheria shallon A 3
Gaultheria sp. G 3 8 *
Gaura biennis J
Gaura lindheimeri A 2
Gaura lindheimeri 'Sparkle White' A 2
Gaura lindheimeri 'Whirling Butterflies' A 2
Gaura sp ? 2
Gaylussacia baccata C
Gazania 'Kiss Frosty White Flame' A
Gazania krebsiana K 2 *
Gazania linearis A
Gelasine coerulea A
Genista albida A 7 *
Genista dalmatica A 7 *
Genista hispanica subsp. occidentalis G 7
Genista horrida A 1 6 7 *
Genista michelii A 7 *
Genista pilosa 'Vancouver Gold' L 7
Genista procumbens A 6 7 *
Genista sagittalis A 1 6 7
Genista sagittalis subsp. delphinensis A 1 6 7
Genista sp. A 1 6 7 *
Genista subcapitata L 1 6 7
Genista sylvestris A 7 *
Genista sylvestris var. pungens A 7 *
Genista tinctoria A 1 6 7
Gentiana 'True Blue' E 3 *
Gentiana acaulis D 4 *
Gentiana acaulis 'Arctic Fanfare' D 4 *
Gentiana acaulis 'Rannoch' D 4 *
Gentiana acaulis 'Undulatifolia' D 4 *
Gentiana affinis L *
Gentiana alba A *
Gentiana andrewsii E 3 *
Gentiana angulosa L 3 *
Gentiana angustifolia A *
Gentiana angustifolia 'Frei' C *
Gentiana angustifolia 'Iceberg' C *
Gentiana asclepiadea A 3 *
Gentiana asclepiadea 'Alba' A 3 *
Gentiana asclepiadea 'Rosea' A 3 *
Gentiana bavarica var. subacaulis E *
Gentiana bigelowii L *
Gentiana boissieri G *
Gentiana burseri subsp. villarsii L *
Gentiana cachemirica A *
Gentiana calycosa A *
Gentiana clausa L *
Gentiana clusii D 4 *
Gentiana clusii ssp. clusii D 4 *
Gentiana clusii subsp. rochelii D 4 *
Gentiana crassicaulis ! E *
Gentiana cruciata ! B 3 5 *
Gentiana cruciata 'Blue Cross' ! B 3 *
Gentiana cruciata subsp. phlogifolia ! B 3 5 *
Gentiana dahurica L 4 *
Gentiana dahurica var. dahurica ! L 3 *
Gentiana decumbens A *
Gentiana depressa L *
Gentiana dinarica A 3 5 *
Gentiana divisa B *
Gentiana fischeri A *
Gentiana freyniana J *
Gentiana gelida L *
Gentiana gracilipes ! L 3 *
Gentiana gracilis L *
Gentiana grossheimii A *
Gentiana kurroo B *
Gentiana lagodechiana A *
Gentiana ligustica A 5 *
Gentiana linearis L *
Gentiana loderi A *
Gentiana lutea E *
Gentiana macrophylla ! J 2 *
Gentiana macrophylla subsp. fetisowii J *
Gentiana makinoi 'Luis Easy Blue' J
Gentiana occidentalis A 5 *
Gentiana olgae A *
Gentiana olivieri L *
Gentiana pannonica E 2 *
Gentiana paradoxa G *
Gentiana paradoxa 'Blue Herald' ! B 3 *
Gentiana pneumonanthe E *
Gentiana puberulenta G *
Gentiana punctata ! E 2 *
Gentiana purpurea E 3 *
Gentiana rhodantha ? *
Gentiana rigescens G *
Gentiana rostanii K *
Gentiana saponaria ! E 2 *
Gentiana saxosa E 4 *
Gentiana scabra ! A 3 *
Gentiana scabra 'Shusui Blue' ! A 3 *
Gentiana septemfida A *
Gentiana septemfida subsp. grossheimii A *
Gentiana septemfida subsp. lagodechiana A *
Gentiana septemfida var. lagodechiana A *
Gentiana septemfida var. lagodechiana 'Hascombensis' A *
Gentiana sino-ornata A *
Gentiana sino-ornata 'Zauberglocke' A *
Gentiana sino-ornata hybrids A *
Gentiana siphonantha J 3 *
Gentiana sp. ! L *
Gentiana squarrosa ? *
Gentiana stragulata L *
Gentiana striata ? *
Gentiana stricta L *
Gentiana sylvestris G *
Gentiana terglouensis subsp. schleicheri L *
Gentiana tianschanica A *
Gentiana tibetica A *
Gentiana triflora G *
Gentiana triflora var. japonica G *
Gentiana uchiyamae L *
Gentiana veitchiorum G *
Gentiana verna E 4 *
Gentiana verna subsp. angulosa E 4 *
Gentiana verna subsp. balcanica E 4 *
Gentiana verna subsp. pontica E 4 *
Gentiana verna subsp. tergestina E 4 *
Gentiana verna x pumila E 4 *
Gentiana walujewii L *
Gentiana wutaiensis J *
Gentiana x hascombensis L *
Gentiana x stevenagensis A 2 *
Gentiana yakushimensis A *
Gentianella amarella G *
Gentianella detonsa subsp. nesophila A 3
Gentianella germanica A 3 4
Gentianopsis crinita ! K *
Gentianopsis procera ! L
Gentianopsis sp. ?
Gentianopsis virgata ! L
Geranium argenteum A
Geranium bohemicum A
Geranium bohemicum 'Orchid Blue' A
Geranium brutium L
Geranium clarkei A 2
Geranium collinum F 2
Geranium dalmaticum A
Geranium endressii 'Wargrave Pink' A
Geranium eriostemon L
Geranium harveyi A
Geranium himalayense K
Geranium macrorrhizum A
Geranium macrorrhizum 'Bevan's Variety' A
Geranium maculatum L
Geranium maculatum 'Elizabeth Ann' L
Geranium molle L
Geranium nodosum J
Geranium oxonianum f. thurstonianum A
Geranium palustre F
Geranium phaeum A
Geranium phaeum var. phaeum A
Geranium phaeum var. phaeum 'Samobor' A
Geranium Philippe Vapelle' ?
Geranium platyanthum L
Geranium platypetalum A 2
Geranium pratense E
Geranium pratense 'Dark Reiter' L
Geranium pratense 'Midnight Reiter' L
Geranium pratense 'Mrs. Kendall Clark' E
Geranium pratense 'Okey Dokey' E
Geranium pratense 'Striatum' E
Geranium pratense 'Victor Reiter' E
Geranium pratense var. pratense f. albiflorum E
Geranium pratense var. pratense f. albiflorum 'Galactic' E
Geranium psilostemon J
Geranium pyrenaicum L
Geranium regelii F 2
Geranium renardii A
Geranium ruprechtii F 2
Geranium sanguineum F 2
Geranium sanguineum 'Alpenglow' F 2
Geranium sanguineum 'Ankum 's Pride' F 2
Geranium sanguineum 'John Elsley' F 2
Geranium sanguineum 'Max Frei' A
Geranium sanguineum 'New Hampshire Purple' F 2
Geranium sanguineum f. nanum J 2 *
Geranium sanguineum var. striatum J 2 *
Geranium sessiliflorum K
Geranium sinense A 2
Geranium sp. K
Geranium Sweet Heidy' ?
Geranium sylvaticum A
Geranium thunbergii A
Geranium thunbergii 'Jesters Jacket' A
Geranium wallichianum A
Geranium x johnsonii 'Johnson's Blue' A
Geranium x oxonianum K
Geranium x oxonianum 'Claridge Druce' A
Geranium x oxonianum 'Katherine Adele' A
Geranium x oxonianum 'Wargrave Pink' K
Geranium yesoense K
Geranium yoshinoi A
Gerardia paupercula A
Gerbera jamesonii Bengal Series A
Gerbera nivea A
Gerbera sp. ! A
Geum Borisii' A
Geum bulgaricum B
Geum canadense K
Geum chiloense A 3
Geum coccineum A 3
Geum coccineum 'Cooky' A 3
Geum coccineum 'Koi' A 3
Geum Dolly North' A 3
Geum Feuerball' A
Geum Fire Storm' ?
Geum japonicum A
Geum Lady Stratheden' L
Geum Lionel Cox' B 3
Geum Lisanne' A
Geum macrophyllum A
Geum montanum G 2
Geum Mrs J. Bradshaw' A
Geum pentapetalum A
Geum ponticum A
Geum pyrenaicum F
Geum quellyon A 3
Geum reptans A
Geum rivale B 3
Geum rivale 'Leonard's Variety' B 3
Geum rivale 'Pink Frills' B 3
Geum triflorum A *
Geum triflorum var. ciliatum A *
Gilia aggregata L
Gilia capitata subsp. abrotanifolia A
Gilia haydenii L
Gilia rigidula L
Gilia subnuda L
Gilia superba L
Gillenia stipulata E
Gillenia trifoliata F
Gillenia trifoliata 'Pink Profusion' F
Gladiolus 'Kim' A
Gladiolus 'Purple Flora' L
Gladiolus Atom' A
Gladiolus atroviolaceus F
Gladiolus byzantinus A
Gladiolus callianthus K
Gladiolus carneus A
Gladiolus caucasicus J
Gladiolus communis A
Gladiolus communis subsp. byzantinus A
Gladiolus dalenii A
Gladiolus dubius G
Gladiolus flanaganii K
Gladiolus geardii A
Gladiolus hybrid L
Gladiolus illyricus J
Gladiolus imbricatus L
Gladiolus italicus F
Gladiolus kotschyanus F
Gladiolus murielae K
Gladiolus oppositiflorus F
Gladiolus palustris E
Gladiolus saundersii G
Gladiolus sp. E
Gladiolus tenuis J
Gladiolus trichomenifolius ?
Gladiolus tristis F
Glaucidium palmatum ! A 2 4
Glaucidium palmatum 'Album' ! A 2 4
Glaucidium palmatum var. leucanthum ! A 2 4 *
Glaucium corniculatum B
Glaucium flavum A 2
Glaucium grandiflorum K
Glaucium leiocarpum A 2
Glaucium oxylobum A 2
Glaucium sp. K
Glebionis coronaria A
Gleditsia triacanthos A 6 7
Globularia aff. repens A
Globularia bisnagarica A
Globularia cordifolia A 3
Globularia cordifolia subsp. nana B 3
Globularia incanescens J
Globularia meridionalis A 3
Globularia mix L
Globularia nudicaulis A 2
Globularia pseudonana ?
Globularia punctata A 3
Globularia repens A
Globularia sp. L
Globularia spinosa A 3
Globularia stygia A 3
Globularia trichosantha A
Globularia vulgaris A
Gloriosa modesta A
Gloriosa rothschildiana ! A
Gloriosa superba ! A
Gloriosa superba 'Rothschildiana' ! A
Glycine max A
Glycyrrhiza echinata A 7
Glycyrrhiza glabra A 7
Glycyrrhiza uralensis A 6 7
Glycyrrhiza yunnanensis A 6 7
Gnaphalium obtusifolium A 3
Gomphocarpus physocarpus A
Gomphrena globosa A
Gomphrena sp. A 2 *
Gomphrena Fireworks' A *
Gomphrena globosa 'Gnome Purple' A
Gomphrena globosa Gnome Series A
Gomphrena haageana 'Strawberry Fields' K
Gomphrena pulchella 'Fireworks' A *
Goniolimon tataricum A
Goodyera pubescens A *
Gossypium herbaceum A
Graemia aromatica N *
Grayia spinosa A
Grenadilla sp. A 6
Grevillea robusta A
Grielum grandiflorum A 7
Grindelia squarrosa K
Gunnera chilensis A 8
Gunnera tinctoria A 8
Gymnocladus dioicus A 6 7
Gynandriris sisyrinchium ! J
Gypsophila all species A
Gypsophila cerastioides A
Gypsophila elegans 'Kermesina' A
Gypsophila franzii A
Gypsophila muralis A
Gypsophila oldhamiana A
Gypsophila paniculata A
Gypsophila petraea A
Gypsophila repens A
Gypsophila repens 'Filou Rose' A
Gypsophila repens 'Rosea' A
Gypsophila sericea ?. 3
Gypsophila sp. A
Gypsophila tenuifolia J 3
Gypsophila uralensis A
Gypsophila zhegulensis A
Haberlea all species A
Haberlea rhodopensis A *
Haberlea sp. A
Habranthus brachyandrus A
Habranthus robustus A
Habranthus tubispathus A
Hackelia sp. ?
Hacquetia epipactis ! L
Haemanthus albiflos A
Hakonechloa hybrid A
Hakonechloa macra 'All Gold' A
Hakonechloa macra 'Aureola' A
Hakonechloa sp. A
Halenia deflexa ? 3
Halesia carolina C 6 7 *
Halesia monticola D *
Halesia sp. D *
Halesia tetraptera C *
Halesia tetraptera 'Silver Splash' C
Halesia tetraptera var. monticola D *
Haloragis erecta H 7 *
Haloragis erecta 'Wellington Bronze' H 2 6
Hamamelis virginiana D
Hamamelis x intermedia 'Arnold Promise' D
Hamamelis x intermedia 'Jelena' D
Hamamelis x intermedia 'Primavera' D
Hardenbergia violacea A 6 7
Hastingsia alba L
Hebe Carl Teschner' ! L
Hebe species ! L
Hebe Youngii' ! J
Hedychium spicatum A
Hedyotis longifolia A
Hedysarum alpinum B 1 6 7 *
Hedysarum boreale subsp. mackenzii B 1 6 7 *
Hedysarum grandiflorum G 6
Helenium amarum A 3
Helenium aromaticum A
Helenium autumnale B
Helenium autumnale 'Fuego' B
Helenium autumnale 'Salsa' B
Helenium bigelovii A
Helenium bigelovii 'Big Top' B
Helenium Double Trouble' B
Helenium flexuosum A
Helenium hoopesii A
Helenium hybrid B
Helenium Moerheim Beauty' B
Helenium montanum B
Helenium Sahin's Early Flowerer' B
Helenium sp. A
Helianthemum alpestre D
Helianthemum annuus cv. A
Helianthemum apenninum F
Helianthemum apenninum var. roseum F
Helianthemum Ben Nevis' D
Helianthemum canum A
Helianthemum canum subsp. balcanicum A
Helianthemum grandiflorum D
Helianthemum hybrid A
Helianthemum marifolium A
Helianthemum nummularium D
Helianthemum nummularium subsp. grandiflorum D
Helianthemum nummularium subsp. nummularium D
Helianthemum oelandicum subsp. alpestre D
Helianthemum oelandicum subsp. alpestris A
Helianthemum Raspberry Ripple' A
Helianthemum sp. A
Helianthus annuus 'Russian Giant' A
Helianthus annuus cv. A
Helianthus giganteus J
Helianthus hybrid A
Helianthus Lemon Queen' J
Helianthus maximiliani L
Helianthus rydbergii ?
Helianthus salicifolius A
Helianthus sp. A
Helichrysum thianshanicum A 3
Helichrysum bracteatum A 2
Helichrysum chionophilum ! A
Helichrysum milfordiae A
Helichrysum petiolare A
Helichrysum plicatum subsp. plicatum ! A
Helichrysum sessilioides A
Helichrysum sp. A
Helichrysum thianschanicum A
Helictotrichon sempervirens ! E
Heliopsis helianthoides A
Heliopsis helianthoides 'Loraine Sunshine' A
Heliopsis helianthoides v. scabra A
Heliopsis helianthoides v. scabra 'Bleeding Hearts' A
Heliopsis helianthoides var. scabra 'Asahi' A
Heliopsis helianthoides var. scabra 'Bleeding Hearts' A
Heliopsis helianthoides var. scabra 'Bressingham Doubloon' A
Heliopsis helianthoides var. scabra 'Prairie Sunset' A
Heliopsis scabra A
Heliopsis sp. A
Heliotropium arborescens 'Marine' A
Helleborus 'Snowbells' ! D 7 *
Helleborus all species ! *
Helleborus argutifolius ! D 7 *
Helleborus argutifolius x sternii ! D 7 *
Helleborus foetidus ! D 7 *
Helleborus foetidus 'Gold Bullion' ! D 7 *
Helleborus foetidus 'Red Silver' ! D 7 *
Helleborus foetidus 'Sopron' ! D 7 *
Helleborus foetidus 'Variegata' ! D 7 *
Helleborus foetidus 'Wester Flisk' ! D 7 *
Helleborus hybrid ! D 7 *
Helleborus lividus ! D 7 *
Helleborus lividus subsp. corsicus ! D 7 *
Helleborus multifidus subsp. serbicus ! D 7 *
Helleborus niger ! D 7 *
Helleborus niger 'Kessen' ! D 7 *
Helleborus niger 'Potter's Wheel' ! D 7 *
Helleborus niger 'Sunset' ! D 7 *
Helleborus odorus ! D 7 *
Helleborus orientalis ! D 7 *
Helleborus orientalis 'Rainforest Mist' ! D 7 *
Helleborus orientalis subsp. guttatus ! D 7 *
Helleborus purpurascens ! D 7 *
Helleborus sp. ! D 7 *
Helleborus thibetanus ! L *
Helleborus torquatus ! D 7 *
Helleborus viridis ! D 7 *
Helleborus viridis subsp. occidentalis ! D 7 *
Helleborus x ballardiae ! D 7 *
Helleborus x hybridus ! D 7 *
Helleborus x hybridus 'Cherry Blossom' ! D 7 *
Helleborus x hybridus 'Picotee' ! D 7 *
Helleborus x hybridus (Party Dress Group) ! D 7 *
Helleborus x sternii (Blackthorn Group) ! D 7 *
Helonias bullata A 3
Helonias orientalis A *
Heloniopsis orientalis A *
Hemerocallis 'Pardon Me' J
Hemerocallis Cherry Ripe' J
Hemerocallis Chicago Apache' A
Hemerocallis flava F
Hemerocallis Happy Returns' A
Hemerocallis hybrid A
Hemerocallis Hyperion' A
Hemerocallis lilioasphodelus F
Hemerocallis Little Cherub' A
Hemerocallis Lucky Kiss' A
Hemerocallis middendorffii F
Hemerocallis minor F
Hemerocallis Sandy Yudin' A
Hemerocallis Siloam Double Classic' A
Hemerocallis Siloam Red Ruby' A
Hemerocallis sp. J
Hemerocallis Stella de Oro' A
Hemerocallis tetraploid hybrid J 7
Hemerocallis thunbergii A
Hepatica americana ! E *
Hepatica nobilis ! E *
Hepatica nobilis f. rosea ! E *
Hepatica transsilvanica ! E *
Heptacodium miconioides ! A
Heracleum maximum L
Heracleum minimum 'Roseum ' A
Heracleum sp. ?
Heracleum sphondylium A
Heracleum sphondylium 'Pink Cloud' E
Heracleum sphondylium subsp. montanum A
Heracleum stevenii ?
Hermodactylus tuberosus C 2
Hesperantha baurii A *
Hesperantha coccinea A
Hesperis all species A
Hesperis kotschyi A 3
Hesperis lutea A
Hesperis matronalis A
Hesperis matronalis 'Variegata' A
Hesperis steveniana A
Heteropappus altaicus A
Heteropappus meyendorffii A 3
Heterotheca jonesii A
Heterotheca pumila A
Heterotheca villosa B
Heuchera all species *
Heuchera americana A
Heuchera americana 'Eco-magnififolia' A
Heuchera americana (Dale's Strain) A
Heuchera chlorantha A 3
Heuchera Crispy Curly' A
Heuchera cylindrica A 3 *
Heuchera Green Ivory' A
Heuchera grossulariifolia A
Heuchera hallii C 3
Heuchera hispida var. richardsonii A 3
Heuchera hybrid A 3
Heuchera micrantha A
Heuchera ovalifolia A 3 *
Heuchera parishii A 3
Heuchera pulchella A 3
Heuchera richardsonii A 3
Heuchera sanguinea A
Heuchera sp. B
Heuchera versicolor A
Heuchera villosa A
Heuchera villosa 'Palace Purple' A
Heuchera villosa var. macrorhiza A 3
Heuchera x brizoides A 3
Hibiscus cannabinus A 6 *
Hibiscus cannabinus 'Amethyst' ! A 6 7
Hibiscus ludwigii A 6 7
Hibiscus militaris A
Hibiscus mix ! A 6 7
Hibiscus moscheutos ! A 6 7
Hibiscus moscheutos ?Luna Rose? ! A 6 7
Hibiscus moscheutos 'Blue River ii ' ! A 6 7
Hibiscus moscheutos 'Cranberry Crush' ! A 6 7
Hibiscus moscheutos 'Moon River' ! A 6 7
Hibiscus moscheutos 'Peppermint Schnapps' ! A 6 7
Hibiscus moscheutos 'Red Dixie Belle' ! A 6 7
Hibiscus moscheutos (Southern Belle Group) ! A 6 7
Hibiscus moscheutos subsp. palustris ! A 6 7
Hibiscus mutabilis A
Hibiscus palustris ! A 6 7
Hibiscus richardsonii A
Hibiscus sabdariffa ! A 6 7
Hibiscus sinensis A
Hibiscus sp. ! A 6 7
Hibiscus syriacus A
Hibiscus syriacus 'Blue Bird' A
Hibiscus syriacus 'Blue Satin' A
Hibiscus syriacus 'Diana' A
Hibiscus trionum A 2 6 7
Hibiscus trionum 'Simply Love' A 2 6 7
Hibiscus trionum 'Vanilla Ice' A 2 6 7 *
Hibiscus White River' A 6
Hieracium alpinum A
Hieracium aurantiacum A
Hieracium bombycinum A
Hieracium glaucinium ssp. similatum ?
Hieracium lanatum A
Hieracium maculatum J 3
Hieracium maculatum 'Leopard' J 3
Hieracium maculatum ssp. maculatum J 3
Hieracium mixtum A
Hieracium pachylodes A
Hieracium pachylodes subsp. floccivelatum A
Hieracium pannosum K
Hieracium pilosella A
Hieracium scotostictum A
Hieracium sp. J *
Hieracium tomentosum B
Hieracium venosum ? 3
Hieracium villosum J 3
Hieracium waldsteinii A
Hierochloe odorata A *
Hippeastrum Sydney' A *
Hippophae rhamnoides G 4
Holodiscus discolor L
Homogyne alpina A
Hormathophylla spinosa A 3
Horminum pyrenaicum A
Hornungia alpina A
Hornungia alpina 'Icecube' A
Hosta 'Diamond Tiara' A
Hosta Abiqua Drinking Gourd' A
Hosta Antioch' A
Hosta August Moon' A
Hosta Aureomarginata' (montana) A
Hosta Beatrice' A
Hosta Blue Angel' (sieboldiana) A
Hosta Blue Boy' A
Hosta Blue Cadet' A
Hosta Blue Moon' (Tardiana Group) A
Hosta Blue Umbrellas' (siebold. hyb) A
Hosta Bressingham Blue' A
Hosta Bright Lights' (tokudama) A
Hosta Calibur' A
Hosta capitata A
Hosta Carol' (fortunei) A
Hosta Chinese Sunrise' A
Hosta Christmas Tree' A
Hosta Colossal' A
Hosta Dorothy Benedict' A
Hosta El Nino' A
Hosta Elsley Runner' A
Hosta Empress Wu' A
Hosta Fall Bouquet' (longipes var. Hypoglauca) A
Hosta fortune 'Minuteman' A
Hosta fortunei 'Aurea' A
Hosta fortunei var. aureomarginata A
Hosta fortunei var. hyacinthina A
Hosta fortunei var. rugosa A
Hosta fortunei var. stenantha A
Hosta Fragrant Blue' A
Hosta Francee' (fortunei) A
Hosta Frances Williams' (sieboldiana ) A
Hosta Fringe Benefit' A
Hosta Frosted Jade' A
Hosta Ginko Craig' A
Hosta Gold Edger' (tokudama) A
Hosta Golden Medallion' (tokudama) A
Hosta Golden Sceptre' A
Hosta Golden Tiara' A
Hosta Green Eyes' (sieboldii) A
Hosta Hakujima' (sieboldii) A
Hosta Halcyon' (Tardiana Group) A
Hosta hybrid A
Hosta Hydon Sunset' A
Hosta Inniswood' A
Hosta japonica f. angustifolia A
Hosta June' (Tardiana Group) A
Hosta Kabitan' A
Hosta kikutii A
Hosta lancifolia A
Hosta Let's Streak' A
Hosta Little White Lines' A
Hosta Love Pat' A
Hosta Minima' A
Hosta minor A
Hosta Minuteman' (fortunei) A
Hosta montana A
Hosta nakaiana 'Golden Tiara' A
Hosta Neat Splash' A
Hosta OHS Calamari' A
Hosta Pacific Blue Edger' A
Hosta Paul's Glory' A
Hosta Piedmont Gold' A
Hosta pycnophylla A
Hosta pygmaea A
Hosta rectifolia A
Hosta Rock Princess' A
Hosta Sagae' A
Hosta Sea Sprite' A
Hosta seiboldiana 'Ginko Craig' A
Hosta seiboldiana f. kabitan A
Hosta seiboldiana var. elegans A
Hosta Serendipity' A
Hosta sieboldiana A
Hosta sieboldiana var. glauca A
Hosta Snow Flakes' (sieboldii) A
Hosta sp. A
Hosta Starburst' A
Hosta Sum and Substance' A
Hosta Sun Power' A
Hosta Swarthmore Surprise' A
Hosta Tardiana Group A
Hosta Tiny Tears' A
Hosta tokudama A
Hosta tsushimensis A
Hosta ventricosa A
Hosta venusta A
Hosta Wogon' (sieboldii) A
Hosta X rated' A
Hosta Yellow Splash Rim' A
Hosta Zageblue' A
Hosta Zounds' A
Houstonia caerulea A
Houstonia longifolia A
Houstonia tenuifolia A
Hoya miniata A
Hunnemannia fumariifolia A
Hutchinsia all species A
Hutchinsia alpina A
Hutchinsia alpina ?Icecube' A
Huynhia pulchra C
Hyacinthella pallasiana L *
Hyacinthoides cedretorum ?
Hyacinthoides hispanica J
Hyacinthoides non-scripta F 3
Hydrangea arborescens G
Hydrangea aspera subsp. sargentiana A
Hydrangea sargentiana A
Hydrangea serrata A 3
Hydrangea serrata 'Koreana' A 3
Hydrastis canadensis ! L 8
Hydrophyllum canadense ! G
Hydrophyllum virginianum J
Hylomecon japonica ! E 4 *
Hylotelephium cauticola A 3
Hylotelephium maximum A 3
Hymenolaena badachschanica ?
Hymenoxys acaulis A
Hymenoxys cooperi A
Hymenoxys grandiflora A
Hymenoxys herbacea A
Hymenoxys hoopesii A
Hymenoxys integrifolia ?
Hymenoxys sp A
Hymenoxys torreyana A
Hyoscyamus albus A 2 *
Hyoscyamus niger A 4 7 *
Hypericum adenotrichum A
Hypericum androsaemum A
Hypericum androsaemum 'Albury Purple' A
Hypericum androsaemum f. variegatum A
Hypericum androsaemum f. variegatum 'Mrs Gladis Brabazon' A
Hypericum ascyron E 3
Hypericum ascyron var. pyramidatum A
Hypericum athoum A
Hypericum aviculariifolium subsp. uniflorum K
Hypericum bupleuroides ?
Hypericum canadense J 3
Hypericum cerastioides E
Hypericum inodorum K
Hypericum kalmianum L
Hypericum kalmianum 'Ames' L
Hypericum kamtschaticum A
Hypericum kiusianum var. yakusimense A
Hypericum lancasteri A
Hypericum olympicum ! A 4
Hypericum olympicum f. grandiflorum ! A 4
Hypericum olympicum f. uniflorum 'Citrinum' ! A 4
Hypericum orientale A
Hypericum perforatum K
Hypericum prolificum A
Hypericum pseudopetiolatum var. yakusimense A
Hypericum pyramidatum A
Hypericum sp. L
Hypericum tomentosum A
Hypericum uniflorum K
Hypericum virginicum A
Hypericum yakusimense A
Hypochaeris maculata K
Hypochaeris uniflora B
Hypoxis hirsuta A *
Hyssopus officinalis A 2
Hyssopus officinalis subsp. aristatus A 2
Hysteria patula *
Iberis all species A
Iberis amara A
Iberis aurosica A
Iberis aurosica ssp. nana A
Iberis gibraltarica A 3
Iberis gibraltarica 'Chill Lavender' A 3
Iberis linifolia A
Iberis pruitii A
Iberis saxatilis A
Iberis saxatilis 'Pygmaea' A
Iberis sempervirens F
Iberis sempervirens 'Schneeflocke' B
Iberis sempervirens 'Snowflake' B
Iberis simplex A 3
Iberis sp. J
Iberis taurica A 3
Iberis umbellata A 2
Ilex all species L
Ilex glabra ! L 6 8
Ilex verticillata L 8 *
Ilex x meserveae L
Iliamna remota A 6 *
Iliamna rivularis A 6 *
Impatiens balfourii ! A
Impatiens capensis J
Impatiens glandulifera L
Impatiens pallida A
Impatiens parviflora A
Incarvillea all species *
Incarvillea arguta A
Incarvillea compacta J
Incarvillea delavayi A
Incarvillea delavayi 'Alba' A
Incarvillea delavayi 'Bee's Pink' A
Incarvillea delavayi 'Snowtop' A
Incarvillea grandiflora A
Incarvillea himalayensis 'NtSama ' A
Incarvillea mairei A
Incarvillea mairei 'Alba' J
Incarvillea mairei var. grandiflora A
Incarvillea olgae A
Incarvillea sinensis A
Incarvillea sinensis 'Cheron Pink' A
Incarvillea sinensis 'Cheron' A
Incarvillea sp. A
Incarvillea younghusbandii A
Incarvillea zhongdianensis A
Indigofera kirilowii A 7
Indigofera pseudotinctoria A 1 6 7
Indigofera sp. L
Inula acaulis A
Inula candida A
Inula ensifolia A
Inula ensifolia 'Compacta' A
Inula helenium A
Inula helenium 'Goliath' A
Inula hookeri L
Inula macrophylla L
Inula magnifica A
Inula montana A
Inula orientalis A
Inula racemosa A
Inula racemosa 'Sonnenspeer' A
Inula rhizocephala A
Inula royleana A 3
Inula salicifolia A
Inula salicina A
Inula sp. A
Ipheion uniflorum F 4
Ipomoea alba A 6 7
Ipomoea batatas A 6 7
Ipomoea coccinea A 6 7
Ipomoea hybrid A 6 7
Ipomoea leptophylla A 6 7
Ipomoea lindheimeri A 6 7
Ipomoea lobata A 6 7
Ipomoea purpurea A 6 7
Ipomoea purpurea 'Milky Way' A 6 7
Ipomoea purpurea 'Grandpa Ott's' A 6 7
Ipomoea purpurea 'Heavenly Blue' A 6 7
Ipomoea purpurea 'Milky Way' A 6 7
Ipomoea purpurea 'Split Second' A 6 7
Ipomoea quamoclit A 6 7
Ipomoea quamoclit 'Rosea. A 6 7
Ipomoea sp. A 6 7
Ipomoea tricolor A 6 7
Ipomoea tricolor 'Blue Star' A 6 7
Ipomoea tricolor 'Flying Saucers' A 6 7
Ipomoea x multifida A 6 7
Ipomoea x sloteri A 6
Ipomopsis aggregata A 1
Ipomopsis rubra A 1
Iris all species L *
Iris anglica C 7 *
Iris aphylla A *
Iris arctica L 7 *
Iris arenaria E *
Iris astrachanica L *
Iris biversata L 7 *
Iris Black Gamecock' A *
Iris bloudowii L *
Iris bucharica E 7 *
Iris bulleyana A 3 *
Iris Caesar's Brother' A 3 7 *
Iris carthaliniae E 7 *
Iris chrysographes 'Nigra ' J *
Iris clarkei J 3 7 *
Iris collettii L 7 *
Iris confusa L 7 *
Iris cristata 'Alba' G 7 *
Iris cross L 7 *
Iris decora ! J 7 *
Iris delavayi G *
Iris dichotoma A 7 *
Iris domestica A 3
Iris domestica 'Pink Profusion' A 3
Iris douglasiana H *
Iris douglasiana 'Alba' F *
Iris douglasiana hybrid F *
Iris douglasiana x innominata F *
Iris ensata L 7 *
Iris ensata 'Alba' L 7 *
Iris ensata 'Eden's Paintbrush' L 7 *
Iris ensata 'Geisha Girl' L 7 *
Iris ensata 'Henry's White' L 7 *
Iris ensata 'Lapetus' L 7 *
Iris ensata 'Rose Queen' L 7 *
Iris foetidissima L 7 *
Iris fulva ! C *
Iris gracilipes L *
Iris graeberiana B 3 7 *
Iris graminea E 6 7 *
Iris graminifolia A 3 7 *
Iris halophila E 7 *
Iris Heather Carpet' L 7 *
Iris histrioides x winogradowii L *
Iris hookeri L 7 *
Iris humilis L *
Iris hybrid L 7 *
Iris iberica L 7 *
Iris illyrica E 6 7 *
Iris innominata C 7 *
Iris japonica G 7 *
Iris kaempferi L 7 *
Iris kamaonensis D 7 *
Iris lactea L 7 *
Iris laevigata E 6 7 *
Iris laevigata 'Variegata' E 6 7 *
Iris latifolia C 7 *
Iris louisianica 'Dorothea K. Williamson' A *
Iris lutescens A 7 *
Iris maackii E 6 7 *
Iris magnifica L 7 *
Iris magnifica 'Agalik' L 7 *
Iris magnifica 'Alba' L 7 *
Iris masiae A *
Iris milesii G 2 *
Iris missouriensis L 7 *
Iris My Gold' E 7 *
Iris ochroleuca C 7 *
Iris orchioides L 6 7 *
Iris orientalis C 7 *
Iris Pacific Coast Hybrids G 7 *
Iris pallida subsp. illyrica E 6 7 *
Iris Pink Haze' A 3 7 *
Iris planifolia ! L *
Iris prismatica 'Alba' L *
Iris pseudacorus E 3 6 7 *
Iris pseudacorus 'Variegata' E 3 6 7 *
Iris pumila E 7 *
Iris reichenbachii E 6 7 *
Iris reticulata D *
Iris rosenbachiana 'Varzob' G 7 *
Iris Ruffled Velvet' E 6 7 *
Iris ruthenica L *
Iris sanguinea E 6 7 *
Iris scariosa L *
Iris setosa L 7 *
Iris setosa 'Alba' L 7 *
Iris setosa var. arctica L 7 *
Iris setosa var. canadensis L 7 *
Iris setosa var. hookeri L 7 *
Iris setosa var. nana L 7 *
Iris sibirica A 3 7 *
Iris sibirica 'Alba' A 3 7 *
Iris sibirica 'Butter and Sugar' A 3 7 *
Iris sibirica 'Ego' A 3 7 *
Iris sibirica 'Outset' A 3 7 *
Iris sibirica 'Shirley Pope' A 3 7 *
Iris sibirica 'White Swirl' A 3 7 *
Iris sibirica hybrid A 3 7 *
Iris sintenisii E 7 *
Iris sp. G 7 *
Iris spuria E 7 *
Iris spuria hybrid E 7 *
Iris spuria ssp. musulmanica E 7 *
Iris spuria ssp. musulmanica E 7 *
Iris spuria subsp. carthaliniae E 7 *
Iris spuria var. halophila E 7 *
Iris suaveolens 'Rubromarginata' L *
Iris tectorum A 3 7 *
Iris tectorum 'Alba' A 3 7 *
Iris typhifolia A *
Iris unguicularis subsp. cretensis C *
Iris Uralba Gold' L *
Iris variegata E 6 7 *
Iris versicolor A 3 *
Iris versicolor 'Blue Light' L 7 *
Iris versicolor 'Mint Fresh' A 3 *
Iris West Coast hybrid H *
Iris willmottiana L *
Iris winogradowii L *
Iris x germanica L 7 *
Iris x norrisii A 3
Iris x pseudacorus E 3 6 7 *
Iris xiphioides C 4 7 *
Isatis glauca A 2 *
Isatis indigotica A
Isatis sp. A
Isatis tinctoria A 2 *
Isodon japonicus ?
Isolepis cernua A 3 *
Isophysis tasmanica ! J 3 *
Isopyrum thalictroides ! E
Isotoma axillaris A
Ixeris dentata var. alpicola K
Ixiolirion pallasii F
Ixiolirion sp. ! L
Ixiolirion tataricum F
Ixiolirion tataricum var. tataricum F
Jacobaea maritima A
Jasione amethystina A
Jasione crispa A
Jasione crispa subsp. amethystina A
Jasione dentata A
Jasione heldreichii A
Jasione humilis A
Jasione jankae A
Jasione laevis A
Jasione montana A
Jasione perennis A
Jasione sp. L
Jeffersonia diphylla ! E *
Jeffersonia dubia ! E *
Jovellana sinclairii A
Jovibarba heuffelii A
Jovibarba heuffelii 'Sundancer' A
Jovibarba sobolifera A 3
Juglans cinerea L
Juncus effusus A 3
Junellia micrantha L 2
Junellia wilczekii L 2
Juniperus horizontalis H 7 *
Juno bucharica E 7 *
Juno caucasica A *
Jurinea cadmea A
Jurinea consanguinea A
Jurinea mollis F
Jurinella moschus A
Jurinella moschus subsp. moschus A
Jurinella moschus subsp. pinnatisecta A
Kalimeris incisa A *
Kalimeris incisa 'Blue Star' A *
Kalimeris mongolica A
Kalmia angustifolia A 3 *
Kalmia polifolia A 3 *
Kalmia procumbens E
Kalmia sp. 3 *
Kalopanax septemlobus ! J
Kennedia coccinea A *
Kennedia prostrata A *
Kernera saxatilis A
Kirengeshoma koreana ! J *
Kirengeshoma palmata ! J *
Kirengeshoma palmata Koreana Group ! J *
Kirengeshoma sp. A
Kitaibelia sp. L
Kitaibelia vitifolia A 2 6
Knautia arvensis F
Knautia avarensis subsp. avarensis A
Knautia dipsacifolia A
Knautia macedonica A 3
Knautia macedonica 'Thunder and Lightning' A 3
Knautia sp. ?
Knautia sylvatica ?
Kniphofia 'Flamenco' B
Kniphofia 'Mango Popsicle' A
Kniphofia 'Pineapple Popsicle' A
Kniphofia 'Tnknibp' *
Kniphofia caulescens B
Kniphofia Dwarf Hybrids' B
Kniphofia ensifolia A
Kniphofia ensifolia subsp. ensifolia A
Kniphofia Little Maid' B
Kniphofia Orange Blaze' A
Kniphofia Pfitzer Hybrid' B
Kniphofia pumila B
Kniphofia ritualis A
Kniphofia sp. B
Kniphofia thomsonii var. snowdenii A
Kniphofia Toffee Nosed' A
Kniphofia Toyland Hybrids' B
Kniphofia triangularis A 3
Kniphofia tuckii A
Kniphofia uvaria B
Kniphofia uvaria 'Flamenco' B
Koeleria cristata A
Koeleria glauca B
Koeleria macrantha A
Koeleria vallesiana 'Mountain Breeze' A 3
Koelreuteria paniculata D 6
Koelreuteria sp. G 6
Kolkwitzia amabilis A
Korolkowia sewerzowii ! L *
Kosteletzkya virginica A
Lablab purpureus A
Lablab sp. A
Laburnum alpinum A 6 7 *
Laburnum anagyroides A 6 7 *
Laburnum sp. A 6 7
Laburnum x watereri 'Fastigiata' L
Lachenalia ensifolia A 3
Lachenalia corymbosa A
Lactuca sibirica A
Lagerstroemia 'Gamad I' A
Lagerstroemia indica A
Lagerstroemia indica 'Bellini Grape' A
Lagerstroemia indica 'Congrabel' A
Lagerstroemia indica (Supersonic hybrid) A 6
Lagerstroemia sp. A
Lagurus ovatus K
Lamium amplexicaule A
Lamium armenum subsp. sintenisii A
Lamium sp. L
Lamprocapnos spectabilis ! E
Lamprocapnos spectabilis 'Valentine' ! E
Lantana camara A
Lantana sp. A
Lapathum venosus L
Lapeirousia divaricata C
Lapeirousia laxa A 3
Larix gmelinii J *
Larix kaempferi L
Larix laricina J
Laserpitium gallicum E
Laserpitium latifolium E
Laserpitium siler A
Laserpitium sp. E
Lasianthus hirsutus H
Lathyrus aureus A 6 7
Lathyrus cicera A 7
Lathyrus davidii A 1 2 6 7 *
Lathyrus japonicus A 1 6 7
Lathyrus latifolius A 1 2 6 7 *
Lathyrus latifolius 'Albus' A 1 2 7 *
Lathyrus latifolius 'White Pearl' A 1 2 7 *
Lathyrus laxiflorus A 1 2 6 7 *
Lathyrus odoratus A 1 2 6 7 *
Lathyrus odoratus 'Rose Pearl' A 1 2 6 7 *
Lathyrus rotundifolius A 1 6 7 *
Lathyrus sativus A 7
Lathyrus sp. A 1 6 7 *
Lathyrus sylvestris A 1 6 7 *
Lathyrus tingitanus A 1 6 7 *
Lathyrus tingitanus 'Roseus' A 1 6 7 *
Lathyrus tuberosus A 1 6 7 *
Lathyrus vernus F 1 6 7 *
Lathyrus vernus 'Alba' F 1 6 7 *
Lathyrus vernus 'Alboroseus ' F 1 6 7 *
Lathyrus vernus 'Rainbow' F 1 6 7 *
Lathyrus vernus 'Rosenelfe' F 1 6 7 *
Lathyrus vernus var. albus F 1 6 7 *
Laurentia axillaris A
Laurentia sp. ? 3
Laurentia tenella L
Lavandula angustifolia B
Lavandula angustifolia 'Hidcote' B
Lavandula angustifolia 'Jean Davis' B
Lavandula angustifolia 'Munstead' B
Lavandula angustilfolia 'Royal Velvet' B
Lavandula multifida E
Lavandula multifida 'Spanish Eyes' E
Lavandula sp. B
Lavandula stoechas B
Lavandula stoechas subsp. pedunculata B
Lavandula vera B
Lavandula x intermedia 'Phenomenal' ? E
Lavatera arborea A
Lavatera cachemiriana A
Lavatera rosea A
Lavatera sp. A
Lavatera tauricensis A
Lavatera thuringiaca A
Lavatera trimestris A
Lavatera trimestris 'Silver Cup' A
Lavatera x clementii 'Barnsley' A
Lavatera x clementii 'Barnsley' A
Lavauxia triloba A
Layia glandulosa A
Layia platyglossa A
Leavenworthia exigua A
Ledum all species 3 *
Ledum groenlandicum D 3 *
Ledum sp. D 3
Leibnitzia anandria A
Leibnitzia nepalensis A
Lembotropis nigricans A 1 6 7
Leonotis leonurus A
Leonotis ocymifolia A
Leontodon montanus ? 3
Leontodon sp. ? 3
Leontopodium albogriseum ?
Leontopodium alpinum A 3
Leontopodium alpinum subsp. nivale A 3
Leontopodium alpinum subsp. pamiricum A
Leontopodium andersonii A
Leontopodium calocephalum L
Leontopodium coreanum A
Leontopodium discolor A
Leontopodium fedtschenkoanum A
Leontopodium franchetii A
Leontopodium haplophylloides ?
Leontopodium hayachinense L
Leontopodium hayachinense subsp. miyabeanum L
Leontopodium himalayanum L
Leontopodium jacotianum L
Leontopodium jamesonii A 3
Leontopodium japonicum L
Leontopodium kamtschaticum L
Leontopodium kurilense L
Leontopodium linearifolium A
Leontopodium longifolium A
Leontopodium monocephalum A 3
Leontopodium nanum A 3
Leontopodium nivale A 3
Leontopodium nivale subsp. alpinum A 3
Leontopodium nivale subsp. alpinum 'Everest' A 3
Leontopodium nivale subsp. nivale A 3
Leontopodium ochroleucum L
Leontopodium ochroleucum var. campestre A
Leontopodium palibinianum A
Leontopodium pusillum A
Leontopodium sikkimense ?
Leontopodium souliei A
Leontopodium sp. L
Leontopodium stoechas ?
Leontopodium stracheyi L
Leonurus cardiaca A
Leonurus sibiricus A
Lepargyrea argentea J
Lepidium meyenii A
Lepidium peruvianum A
Leptandra sibirica A
Leptarrhena pyrolifolia A 3
Leptodermis oblonga A 4
Leptospermum scoparium 'Kiwi' (Nanum Group) A
Lespedeza bicolor A 6 7 *
Lespedeza capitata A 6
Lespedeza sp. A 1 6 7 *
Lespedeza thunbergii A 6 7
Lespedeza thunbergii 'Gibraltar' A 6 7
Lespedeza thunbergii 'Summer Beauty' A 6 7
Lespedeza violacea A 1 6 7 *
Lesquerella all species A
Lesquerella arctica A
Lesquerella arctica var. purshii A
Lesquerella kingii A
Lesquerella purshii A
Lesquerella sp. ? 3 4
Leucanthemella serotina A
Leucanthemopsis alpina A
Leucanthemum sp. A
Leucanthemum vulgare A
Leucanthemum x superbum A
Leucanthemum x superbum 'Highland White Dream' A
Leucanthemum x superbum 'Ice Star' A
Leucanthemum x superbum 'Madonna' A
Leucanthemum x superbum 'Sunny Side Up' A
Leucojum aestivum L
Leucojum aestivum 'Gravetye Giant' L
Leucojum autumnale A
Leucojum sp. L
Leucojum vernum ! C *
Leucojum vernum var. carpathicum ! C
Leucothoe catesbaei K
Leuzea carthamoides A
Leuzea centauroides A
Leuzea rhapontica K
Levisticum officinale A
Levisticum scoticum A
Lewisia brachycalyx C
Lewisia columbiana E
Lewisia cotyledon J
Lewisia cotyledon (Ashwood Strain) G
Lewisia leeana L
Lewisia Little Peach' L
Lewisia Little Plum' L
Lewisia longipetala E
Lewisia longipetala ex 'Little Snowberry' E
Lewisia nevadensis L
Lewisia nevadensis 'Alba' L
Lewisia nevadensis 'Rosea' L
Lewisia pygmaea A
Lewisia pygmaea x sierrae E 4
Lewisia rediviva ! L
Lewisia rediviva x pygmaea ! L
Lewisia sierrae A
Lewisia stebbinsii F
Lewisia tweedyi C 4 *
Leycesteria formosa A
Leymus arenarius A
Liatris aspera J
Liatris cylindracea J
Liatris cylindrica J
Liatris ligulistylis J
Liatris punctata J
Liatris pycnostachya A
Liatris scariosa J
Liatris sp. J
Liatris spicata A
Liatris spicata 'Alba' A
Liatris spicata 'Floristan Weiss' A
Liatris spicata 'Kobold' A
Liatris spicata var. montana A
Ligularia alatipes A
Ligularia altaica A
Ligularia dentata A
Ligularia dentata 'Britt Marie Crawford' A
Ligularia dentata 'Desdemona' A
Ligularia dentata 'Dunkellaubig' A
Ligularia dentata 'Othello' A
Ligularia fischeri A
Ligularia Gregynog Gold' D 3
Ligularia hodgsonii A
Ligularia japonica A
Ligularia Little Rocket' A
Ligularia macrophylla A
Ligularia palmatifida A
Ligularia przewalskii A
Ligularia sachalinensis A
Ligularia sibirica A
Ligularia sp. ?
Ligularia stenocephala A
Ligularia tangutica A
Ligularia The Rocket' A
Ligularia veitchiana A
Ligularia vorobievii A
Ligusticum lucidum E
Ligusticum scoticum ! G
Lilium 'Claude Shride' C
Lilium ? dalhansonii 'Mrs R.O. Backhouse' ! B 2
Lilium Acapulco' A
Lilium albanicum C
Lilium alexandrae C
Lilium amabile A
Lilium amoenum L
Lilium Asiatic Hybrids A
Lilium auratum C
Lilium bakerianum A
Lilium Black Dragon' A
Lilium bolanderi *
Lilium bulbiferum A *
Lilium bulbiferum (bulblets) A *
Lilium bulbiferum v. croceum A *
Lilium buschianum A
Lilium callosum A
Lilium canadense B *
Lilium candidum A
Lilium carniolicum C
Lilium Casa Blanca' A
Lilium centifolium A
Lilium cernuum A
Lilium chalcedonicum C
Lilium ciliatum C
Lilium columbianum *
Lilium concolor A
Lilium concolor var. strictum A
Lilium cordatum H *
Lilium cordifolium H *
Lilium davidii A
Lilium distichum B *
Lilium duchartrei A
Lilium fargesi A
Lilium formosanum A *
Lilium formosanum var. pricei A
Lilium Golden Splendor' A
Lilium grayi B *
Lilium hansonii B *
Lilium henryi A
Lilium humboldtii D *
Lilium japonicum C *
Lilium Karen North' A
Lilium kelleyanum *
Lilium kelloggii *
Lilium lancifolium A *
Lilium lankongense A
Lilium ledebourii C
Lilium leichtlinii A
Lilium lijiangense A
Lilium lophophorum A
Lilium mackliniae A
Lilium mackliniae 'Naga Pink' A *
Lilium mackliniae 'Saramati' A *
Lilium maculatum var. dauricum C
Lilium majoense A
Lilium maritimum *
Lilium martagon C
Lilium martagon 'Golden Morning' C
Lilium martagon f. album C
Lilium martagon var. album C
Lilium martagon var. cattaniae C
Lilium medeoloides B *
Lilium michauxii B *
Lilium michiganense B *
Lilium monadelphum B *
Lilium nanum A
Lilium nepalense A
Lilium nobilissimum A *
Lilium ocellatum D *
Lilium oxypetalum var. insigne A *
Lilium pardalinum D *
Lilium pardalinum subsp. vollmeri D *
Lilium parryi D *
Lilium parvum *
Lilium pensylvanicum B *
Lilium philadelphicum J *
Lilium philippinense A *
Lilium Pink Perfection Group A
Lilium pitkinense D *
Lilium polyphyllum C
Lilium pomponium D *
Lilium primulinum A
Lilium pumilum A
Lilium pyrenaicum L *
Lilium regale A
Lilium regale 'Album' A
Lilium rosthornii A
Lilium rubellum C
Lilium sargentiae (bulbils) *
Lilium sargentiae (seeds) A *
Lilium sp. ?
Lilium speciosum C *
Lilium sulphureum (bulbils) *
Lilium sulphureum (seeds) A *
Lilium superbum B *
Lilium szovitsianum B *
Lilium taliense A
Lilium tenuifolium A
Lilium tigrinum A *
Lilium Tiny Snowflake' A *
Lilium tsingtauense C
Lilium vollmeri D *
Lilium wallichianum A *
Lilium wardii A
Lilium washingtonianum C *
Lilium wigginsii *
Lilium x dalhansonii ! B 2
Limnanthes douglasii A
Limonium binervosum A
Limonium cosyrense A
Limonium gougetianum A
Limonium latifolium A
Limonium minutum A
Limonium nashii A
Limonium platyphyllum A
Limonium speciosum A
Linaria aeruginea A
Linaria aeruginea 'Neon Lights' A
Linaria aeruginea subsp. nevadensis A
Linaria alpina A
Linaria dalmatica A
Linaria genistifolia A
Linaria genistifolia subsp. dalmatica A
Linaria maroccana A 3
Linaria purpurea A 3
Linaria purpurea 'Alba' A 3
Linaria purpurea 'Canon Went' A 3
Linaria sp. K
Linaria supina E
Linaria tristis ?
Lindelofia anchusoides A
Lindelofia longiflora E
Lindera benzoin ! L *
Linnaea borealis ! L *
Linum altaicum A
Linum amurense A
Linum austriacum subsp. caucasicum A
Linum bulgaricum A 3
Linum capitatum L 4
Linum cilicicum A
Linum collinum A
Linum compactum F
Linum dolomiticum L
Linum elegans A
Linum flavum A
Linum flavum 'Compactum' F
Linum Gemmels Hybrid' F
Linum grandiflorum A
Linum grandiflorum 'Bright Eyes' A 1
Linum grandiflorum 'Rubrum ' A 1
Linum julicum A
Linum lewisii A 1
Linum marschallianum A
Linum mauritanicum A
Linum narbonense A
Linum perenne A 3
Linum perenne subsp. alpinum 'Alice Blue' A 3
Linum perenne subsp. lewisii A 3
Linum pubescens ?
Linum sp. ?
Linum tauricum A 3
Linum tenuifolium A
Linum usitatissimum A
Liriodendron tulipifera D 2 *
Litchi chinensis A 7
Lithospermum canescens G
Lithospermum incisum A 7 *
Lithospermum officinale A 3 4
Littonia modesta A
Lliamna remota A
Loasa nana A
Loasa triphylla var. volcanica A
Lobelia cardinalis A 3
Lobelia cardinalis 'Queen Victoria' A 3
Lobelia Compliment Scarlet' A
Lobelia Crown Royal' A
Lobelia hybrida A 3
Lobelia inflata A 3
Lobelia kalmii L 3
Lobelia kalmii 'Abby' A 3
Lobelia puberula var. simulans A
Lobelia Queen Victoria' A 3
Lobelia siphilitica A 3
Lobelia siphilitica 'Mistassinica' A 3
Lobelia siphilitica f. alba A 3
Lobelia siphilitica f. albiflora 'Alba' A 3
Lobelia spicata A 3
Lobelia x gerardii A 3
Lobelia x speciosa A
Lobelia x speciosa 'Fan Scharlach' A
Lobelia x speciosa 'Vedrariensis' A 3
Loiseleuria procumbens E
Lomatium canbyi L
Lomatium ciliolatum B
Lomatium grayi G
Lomelosia caucasica A
Lomelosia caucasica 'Perfecta Alba' A
Lonicera alpigena D 8
Lonicera canadensis ! H
Lonicera caprifolium L 8
Lonicera hybrid G
Lonicera sempervirens F 8
Lonicera sempervirens f. sulphurea 'John Clayton' G
Lonicera sp. G
Lonicera x heckrottii 'Gold Flame' L 8
Lopezia cordata A
Lopezia cordata A
Lopezia cordata 'Pretty Rose' J
Lopezia coronata A
Lopezia racemosa A
Lophospermum atrosanguineum A
Lophospermum erubescens A
Lophospermum purpusii A
Lotononis galpinii A
Lotus alpinus A
Lotus corniculatus A 7
Lotus krylovii ? 7 *
Luetkea pectinata A
Lunaria all species A
Lunaria alpina E
Lunaria annua A
Lunaria annua v. albiflora A
Lunaria annua 'Variegata' A
Lunaria annua var. albiflora 'Alba Variegata' A
Lunaria biennis A
Lunaria rediviva E
Lunaria sp. A
Lupinus sp. A
Lupinus 'The Chatelaine' A 1 6 7
Lupinus hybrid A 1 6 7
Lupinus latifolius A 1 6 7
Lupinus lepidus A 1 6 7
Lupinus lepidus var. lobbii A 1 6 7
Lupinus luteus A 1 6 7
Lupinus My Castle' (band of Nobles Series) A 1 6 7
Lupinus nootkatensis A 1 6 7
Lupinus perennis B 1 6 7
Lupinus polyphyllus A 1 6 7
Lupinus Russell Group A 1 6 7
Lupinus Russell hybrids A 1 6 7
Lupinus stiversii A 1 6 7
Lupinus subcarnosus A 1 6 7
Luzula nivea B
Luzula ulophylla A
Lychnis alpina A 3 4
Lychnis alpina 'Alba' A 3 4
Lychnis alpina 'Rosea' A 3 4
Lychnis alpina var. serpentinicola A 3 4
Lychnis apetala A
Lychnis arkwrightii A
Lychnis atropurpurea A
Lychnis chalcedonica A 3 4
Lychnis chalcedonica 'Alba' A 3 4
Lychnis chalcedonica 'Rosea' A 3 4
Lychnis chalcedonica 'Salmonea' A 3 4
Lychnis cognata A 3 4
Lychnis coronaria A 3 4 *
Lychnis coronaria 'Alba' A 3 4
Lychnis coronaria 'Angel's Blush' A 3 4
Lychnis coronaria 'Dancing Ladies' A 3 4
Lychnis coronaria 'Hoarfrost' A 3 4
Lychnis coronaria (Atrosanguinea Group) A 3 4
Lychnis coronaria (Oculata Group) A 3 4
Lychnis coronata var. sieboldii A 3 4
Lychnis flos-cuculi A 3 4
Lychnis flos-cuculi 'Little Robin' A 3 4
Lychnis flos-cuculi 'Nana' A 3 4
Lychnis flos-cuculi 'Petite Jenny' A 3 4
Lychnis flos-cuculi var. congesta A 3 4
Lychnis flos-jovis A
Lychnis flos-jovis 'Nana' A
Lychnis flos-jovis 'Peggy' A
Lychnis haageana A
Lychnis miqueliana A
Lychnis Molten Lava' A
Lychnis sieboldii A
Lychnis sp. A
Lychnis viscaria A 3 4
Lychnis viscaria 'Alba' A 3 4 *
Lychnis viscaria 'Feuer' A 3 4
Lychnis viscaria 'Firebird' A 3 4
Lychnis viscaria 'Splendens Plena ' A 3 4
Lychnis viscaria subsp. atropurpurea A 3 4
Lychnis vulgaris ?
Lychnis wilfordii A 3
Lychnis x arkwrightii 'Orange Gnome' A
Lychnis x arkwrightii 'Vesuvius' A
Lychnis x haageana A
Lychnis yunnanensis A
Lycium barbarum A 7
Lycium chinense A 7
Lycopersicon esculentum A
Lycopersicon esculentum 'Black Krim' A
Lycopersicon esculentum 'Bonny Best' A
Lycopersicon esculentum 'Cherokee' A
Lycopersicon esculentum 'Constoluto Genovese' A
Lycopersicon esculentum 'Grandma Climenhage' A
Lycopersicon esculentum 'Green Zebra' A
Lycopersicon esculentum 'Marvel Stripe' A
Lycopersicon esculentum 'Orange Bandcock' A
Lycopersicon esculentum 'Polish Linguisa' A
Lycopersicon esculentum 'Riesentraube' A
Lycopersicon esculentum 'Sweet Million' A
Lycopersicon esculentum 'Tumbler' A
Lycopersicon esculentum 'Yellow Pear' A
Lycopersicon hybrid A
Lycopodium clavatum A *
Lycopus americanus A
Lycoris radiata A *
Lysichiton camtschatcensis A *
Lysimachia atropurpurea A
Lysimachia atropurpurea 'Beaujolais' A
Lysimachia ciliata A
Lysimachia ciliata 'Firecracker' A
Lysimachia ephemerum A
Lysimachia japonica A
Lysimachia minoricensis A
Lysimachia minutissima A
Lysimachia punctata E
Lythrum alatum J
Maackia amurensis ! A 1 2 7 *
Machaeranthera coloradoensis A
Macleaya cordata C 3
Macleaya microcarpa B
Maclura pomifera A 8 *
Macronema discoidea A
Macuna sp. A
Magnolia 'Little Gem' ! L 8 *
Magnolia amoena ! G *
Magnolia ashei ! L 8 *
Magnolia campbellii ! J 8 *
Magnolia denudata 'Forrest's Pink' ! G *
Magnolia denudata 'Forrest's Pink' G 8 *
Magnolia Gold Star' ! L *
Magnolia grandiflora ! G *
Magnolia grandiflora 'Little Gem' ! G *
Magnolia kobus ! L *
Magnolia sieboldii ! L *
Magnolia species ! L 8 *
Magnolia stellata 'Royal Star' ! L 8 *
Magnolia stellata 'Gold Star' ! L 8 *
Magnolia stellata 'Gold Star' ! L 8 *
Magnolia stellata 'Royal Star' L 8 *
Magnolia tripetala ! H *
Magnolia virginiana ! L *
Magnolia wilsonii ! L 8 *
Magnolia x brooklynensis 'Yellow Bird' ! L 8 *
Magnolia x loebneri 'Merrill' ! L 8 *
Magnolia x loebneri 'Leonard Messel' ! L 8 *
Magnolia x loebneri 'Merrill' ! L 8 *
Magnolia x soulangeana ! L 8 *
Mahonia aquifolium H 8 *
Mahonia hybrid L 8 *
Mahonia repens G 8 *
Mahonia sp. ]X L 8 *
Maianthemum dilatatum ! D *
Maianthemum bifolium v. kamtschaticum ! E *
Maianthemum canadense ! D *
Maianthemum racemosum ! D *
Maianthemum stellatum ! D *
Malus baccata G 6 7 *
Malus ioensis L
Malus sargentii L
Malus toring subsp. sargentii G 6
Malva alcea A
Malva alcea var. fastigiata F
Malva arborea A
Malva cachemiriana A
Malva fastigiata F
Malva moschata A
Malva moschata 'Rosea' A
Malva moschata f. alba A
Malva officinalis A
Malva parviflora K
Malva sp. A
Malva sylvestris A
Malva sylvestris var. mauritiana 'Primley Blue' A
Malva sylvestris var. mauritiana 'Zebrina' A
Malva thuringiaca A
Mandevilla laxa A 7
Margyricarpus pinnatus ! A
Margyricarpus setosus ! A
Marrubium globosum ssp. libanoticum L
Marrubium incanum A
Marrubium libanoticum L
Marrubium libanoticum L
Marrubium sp. J
Marrubium vulgare B
Marshallia grandiflora A
Massonia depressa A
Massonia pustulata A
Matricaria breviradiata ?
Matricaria sp. A 3
Matthiola all species A
Matthiola arborescens A *
Matthiola chorassanica A
Matthiola incana A
Matthiola integrifolia A
Matthiola longipetala A 3
Matthiola longipetala subsp. bicornis A
Matthiola sp. A
Maurandella antirrhiniflora A
Maurandya barclayana A
Maurandya scandens A
Maurandya scandens 'Joan Lorraine' A
Mazus reptans A 3
Meconopsis aculeata A 3 *
Meconopsis all species *
Meconopsis baileyi ! A 1 3 *
Meconopsis baileyi 'Alba' ! A 1 3 *
Meconopsis baileyi 'Hensol Violet' ! A 1 3 *
Meconopsis betonicifolia ! A 1 3 *
Meconopsis cambrica ! C *
Meconopsis cambrica 'Frances Perry' ! C *
Meconopsis cambrica var. aurantiaca ! C *
Meconopsis dhwojii K *
Meconopsis Fertile Blue Group ! C *
Meconopsis grandis A *
Meconopsis horridula B *
Meconopsis hybrid J *
Meconopsis integrifolia A 3
Meconopsis Lingholm' (Fertile Blue Group) ! C *
Meconopsis nepalensis K *
Meconopsis paniculata ! C *
Meconopsis punicea A
Meconopsis quintuplinervia ! L *
Meconopsis sp. J *
Meconopsis villosa A
Meconopsis x beamishii L *
Meconopsis x sheldonii K *
Medeola virginiana ! L 8 *
Medicago lupulina A 8 *
Medicago sativa A
Meehania cordata K
Melaleuca armillaris A *
Melampodium divaricatum A
Melampodium paludosum A
Melampyrum cristatum L *
Melandrium keiskei A
Melanoselinum decipiens A
Melica altissima 'Atropurpurea' B
Melica ciliata A
Melica nutans A
Melica uniflora E
Melilotus alba J 4
Melilotus officinalis A 7
Melinis nerviglumis 'Savannah' A
Melissa officinalis ?
Melothria scabra A
Menispermum canadense J
Menispermum dauricum J
Menispermum sp. ?
Mentzelia decapetala F
Mentzelia sp. ?
Menziesia ferruginea A
Menziesia pentandra ?
Merendera kardiya ! L *
Merremia sibirica A
Mertensia all species *
Mertensia maritima J
Mertensia maritima subsp. asiatica J
Mertensia paniculata ! A
Mertensia primuloides A
Mertensia pterocarpa A
Mertensia sibirica A
Mertensia simplicissima L
Mertensia sp. J
Mertensia virginica J
Mesembryanthemum criniflorum A
Mespilus germanica L 6 7 *
Metasequoia glyptostroboides L 7
Meum athamanticum ! F
Michauxia campanuloides A
Michauxia tchihatchewii A 2 5
Micranthes virginiensis A
Micromeria juliana A
Micromeria thymifolia D 3 4
Microseris ringens 'Girandole' A 2
Milium effusum 'Aureum' A
Mimulus cardinalis A
Mimulus cupreus A
Mimulus cupreus 'Red Emperor' A
Mimulus guttatus A
Mimulus lewisii A
Mimulus ringens A 3
Mimulus sp. A 3
Mina lobata A 6 7
Minuartia all species A
Minuartia helmii A
Minuartia laricifolia A
Minuartia laricifolia subsp. kitaibelii A
Minuartia marcescens A
Minuartia verna A
Mirabilis hirsuta A
Mirabilis jalapa A
Mirabilis jalapa 'Broken Colours' A
Mirabilis jalapa 'Red Glow' A
Mirabilis japonica A
Mirabilis longiflora A
Mirabilis multiflora A 6 7
Mirabilis sp. A
Miscanthus sinensis B
Miscanthus sinensis 'Nippon' B
Miscanthus sinensis 'Sarabande' B
Miscanthus sinensis 'Yaku-jima' B
Miscanthus sp. ?
Mitchella repens ! G *
Mitella breweri A
Mitella caulescens K
Mitella diphylla ! B *
Mitella ovalis A
Mitella pentandra E 3
Mniarum biflorum H 2
Molinia caerulea D
Molinia caerulea subsp. arundinacea D
Molinia caerulea subsp. arundinacea 'Skyracer' E
Molinia caerulea subsp. caerulea D
Molinia caerulea subsp. caerulea 'Variegata' D
Molinia sp. E
Molopospermum peloponnesiacum C 2
Moltkia doerfleri L
Moltkia petraea A 2
Moluccella laevis A
Momordica charantia A 6 7
Monarda 'Jacob Cline' A
Monarda Blaustrumpf' A
Monarda bradburiana A 3
Monarda Cambridge Scarlet' A
Monarda citriodora A
Monarda citriodora 'Bergamo' A
Monarda didyma A
Monarda didyma 'Balmalmose' A
Monarda fistulosa A 3
Monarda Lambada' A
Monarda Marshall's Delight' A 3
Monarda pectinata A
Monarda Petite Delight' A 3
Monarda Prarienacht' A
Monarda punctata A 3
Monarda Raspberry Wine' A
Monarda sp. A
Monardella odoratissima G 3 *
Monopsis debilis K
Monotropa uniflora *
Moraea alticola A
Morina longifolia A
Morina sp. ! L
Morus alba H 7 *
Morus rubra H 7
Muhlenbergia capillaris A 3
Muhlenbergia mexicana A
Muhlenbergia reverchonii A 3 *
Mukdenia rossii J
Muscari armeniacum L *
Muscari azureum L *
Muscari azureum 'Album' L *
Muscari botryoides L *
Muscari comosum F *
Muscari comosum 'Plumosum' F *
Muscari latifolium L *
Muscari neglectum F
Muscari pseudomuscari F 7 *
Muscari Superstar' A
Muscari weissi F *
Mutisia spinosa var. pulchella B
Myosotis alpestris ! A 3
Myosotis olympica ! A
Myosotis popovii A
Myosotis pygmaea A
Myosotis sylvatica A
Myrica caroliniensis ! G *
Myrica gale ! A 3
Myrica pensylvanica ! G *
Myrrhis odorata ! L
Mystery sp. ?
Nabalus altissimus L
Napaea dioica G
Narcissus assoanus L *
Narcissus bicolor L *
Narcissus bulbocodium L *
Narcissus calcicola L *
Narcissus juncifolius L *
Narcissus Little Beauty' ! L *
Narcissus Little Gem' L *
Narcissus obesus L *
Narcissus requienii L *
Narcissus romieuxii L *
Narcissus romieuxii 'Julia Jane' L *
Narcissus rupicola L *
Narcissus serotinus L *
Nassella tenuissima F
Nasturtium sp. A
Navarretia brandegeei A
Nectaroscordum siculum B
Nectaroscordum siculum subsp. bulgaricum B
Nectaroscordum sp. J
Nemesia cheiranthus 'Shooting Stars' A 1
Nemesia coerulea A
Nemesia strumosa A
Nemophila maculata A
Nemophila menziesii A 2
Neomarica caerulea A
Nepeta cataria A
Nepeta clarkei A 2 *
Nepeta govaniana L
Nepeta grandiflora A 2
Nepeta hemsleyana J
Nepeta nepetella A
Nepeta nervosa A 2
Nepeta nervosa 'Pink Cat' A 2
Nepeta parnassica A
Nepeta sessilifolia A *
Nepeta sibirica A
Nepeta Six Hills Giant' A *
Nepeta sp. L
Nepeta subsessilis A
Nepeta teydea A
Nepeta x faasenii A
Nepeta x faassenii A
Nerine bowdenii A
Nerine Isobel' ! A *
Nerium oleander A
Neuroloma schugnanum A
Nicandra Dark Star' A
Nicandra physalodes A
Nicandra physalodes 'Black Rod' A
Nicandra physalodes 'Dark Star' A
Nicotiana acuminata A
Nicotiana alata A 3
Nicotiana alata 'Grandiflora ' A 3
Nicotiana alata 'Lavender Cloud' A 3
Nicotiana alata 'Lime Green' A
Nicotiana alata 'Roulette' A
Nicotiana alata x mutabilis 'Bella ' A 3
Nicotiana attenuata A 3
Nicotiana Aztec Sweet' A
Nicotiana Domino Series A 3
Nicotiana glauca A
Nicotiana Green Goddess' A 3
Nicotiana langsdorffii A
Nicotiana langsdorffii 'Cream Splash' A
Nicotiana Lime Green' A 3
Nicotiana mutabilis A 3
Nicotiana Nicki Series A 3
Nicotiana paniculata A
Nicotiana rustica A 3
Nicotiana sp. A
Nicotiana suaveolens A
Nicotiana sylvestris A 3
Nicotiana sylvestris 'Only the Lonely' A 3
Nicotiana x 'Starlight Dancer' A
Nicotiana x hybrida A 3
Nicotiana x sanderae A 3
Nicotiana x sanderae 'Domino Salmon Pink' A
Nicotiana x sanderae 'Perfume Series' A
Nierembergia hippomanica A *
Nierembergia linariifolia A
Nierembergia scoparia 'Mont Blanc' A *
Nigella damascena A 2
Nigella damascena 'Miss Jekyll Alba' A 2
Nigella damascena 'Miss Jekyll' A 2
Nigella damascena (Persian Jewels Group) A 2
Nigella hispanica A 3
Nigella nigellastrum A
Nigella orientalis A
Nigella papillosa 'African Bride' A
Nigella sativa A
Nigella sp. A
Nipponanthemum nipponicum A
Noccaea fendleri subsp. glauca B
Noccaea oppositifolia A
Noccaea rotundifolia A
Noccaea sintenisii subsp. crissum A
Noccaea vesicaria A
Noccaea zaffranii A
Nolana humifusa A
Nolana paradoxa A 2
Nomocharis aperta A 3 4
Nonea lutea G *
Nonea lutea subsp. variegata G *
Nonea pulchella L
Nothofagus alpina G *
Nothofagus obliqua G
Notholirion thomsonianum A
Nothoscordum gracile A
Nuphar variegata G *
Nymphea Red Flare' A *
Nyssa sylvatica L
Ochna serrulata ! A
Ocimum basilicum *
Ocimum gratissimum 3 *
Ocimum sanctum *
Ocimum sp. ? *
Ocimum tenuiflorum *
Oclemena acuminata B
Oclemena nemoralis L
Odontarrhena obtusifolia A 3 *
Oenothera acaulis A
Oenothera acaulis var. aurea A
Oenothera biennis A 3
Oenothera caespitosa A
Oenothera caespitosa subsp. marginata A
Oenothera campylocalyx J
Oenothera Colin Porter' A
Oenothera cruciata A 3
Oenothera drummondii A
Oenothera flava A
Oenothera fruticosa subsp. glauca A
Oenothera glazioviana A 3
Oenothera kunthiana A
Oenothera Lemon Sunset' J
Oenothera lindheimeri A
Oenothera lindheimeri 'The Bride' A 2
Oenothera macrocarpa B
Oenothera macrocarpa subsp. incana 'Pewter Moon' B
Oenothera missouriensis B
Oenothera parviflora A 3
Oenothera perennis A
Oenothera rosea A
Oenothera sommemweiyae A
Oenothera sp. L
Oenothera speciosa A 2
Oenothera stricta A
Oenothera stricta 'Moonlight' A
Oenothera triloba A
Oenothera versicolor A
Oenothera versicolor 'Sunset Boulevard' A
Olsynium douglasii L
Olsynium junceum ssp. depauperatum ?
Omphalodes cappadocica A
Omphalodes kuzinskyanae ? 2
Omphalodes linifolia A 2
Omphalodes linifolia 'Venus Navel' A 2
Omphalodes lojkae A 3
Omphalodes luciliae ! A 2
Omphalodes luciliae 'Alba' ! A 2
Onobrychis cadmea A
Onobrychis montana A
Onobrychis ruprechtii A
Onobrychis scardica A
Onobrychis sp. L
Onobrychis transsilvanica A
Onobrychis viciifolia K 7
Onoclea sensibilis A *
Ononis rotundifolia A 2 6
Ononis spinosa A 1 6 7
Onopordum acanthium A 5 *
Onopordum algeriense A 2 5 *
Onopordum all species *
Onopordum boissieri L *
Onopordum carduchorum A 2 5 *
Onopordum illyricum J 3
Onopordum messeniacum A 4
Onopordum nervosum L *
Onopordum sibthorpianum A 2 5 *
Onopordum sp. A 2 5 *
Onosma all species *
Onosma arenaria L *
Onosma borysthenica E
Onosma bourgaei A
Onosma caucasica E
Onosma nana G
Onosma rigida G
Onosma sericea A
Onosma sp. E
Onosma stellulata E
Onosma taurica J
Ophiopogon planiscapus 'Arabicus' A
Ophiopogon planiscapus 'Ebony Knight' A
Ophiopogon planiscapus 'Nigra' A
Ophiopogon planiscapus 'Nigrescens' A
Oplopanax horridus L
Opuntia Claude Barr hybrid A 7 8
Opuntia compressa A 5 8
Opuntia cymochila x fragilis 'Smithwick' A
Opuntia humifusa A 5 8 *
Opuntia macrorhiza var. macrorhiza A 8
Opuntia phaeacantha A 7 8
Opuntia polyacantha A 5 8
Opuntia sp. A 7 8
Opuntia tortispina A 7 8
Orbea variegata A
Orchis militaris ! 3 *
Oreomecon alpinum A 3
Oreomecon nudicalis A 3
Origanum all species *
Origanum creticum A
Origanum Kent Beauty' B
Origanum libanoticum A
Origanum rotundifolium A
Origanum sp. A
Origanum vulgare A
Origanum vulgare subsp. hirtum A
Oritrophium repens A
Orlaya grandiflora A
Ornithogalum candicans ! A 2
Ornithogalum magnum B
Ornithogalum montanum B
Ornithogalum nanum A
Ornithogalum narbonense ! L *
Ornithogalum princeps A
Ornithogalum pyrenaicum B
Ornithogalum saundersiae L
Ornithogalum sibthorpii A
Ornithogalum sigmoideum A
Ornithogalum viridiflorum B
Orostachys aggregata K 3 *
Orostachys boehmeri K 3 *
Orostachys iwarenge A
Orostachys malacophylla var. iwarenge A
Orostachys spinosa A
Orthocarpus cuspidatus A
Orthrosanthus laxus A
Orychophragmus violaceus A
Oryzopsis hymenoides A 7 *
Osmorhiza longistylis L
Osmunda regalis A *
Osteospermum barberiae var. compactum A 3
Osteospermum pluvialis 'Glistening White' A
Osteospermum sp. ?
Ostrya virginiana ! *
Ourisia macrophylla A 3
Oxalis valdiviensis *
Oxygraphis glacialis A 3
Oxypetalum coeruleum A
Oxyria digyna A
Oxytropis campestris A *
Oxytropis caucasica A 6 7 *
Oxytropis floribunda ? 6 7 *
Oxytropis fominii A 1 6 7 *
Oxytropis gaudinii A 7 *
Oxytropis halleri A 1 6 7 *
Oxytropis jacquinii A 6 7 *
Oxytropis japonica A 6 7 *
Oxytropis johannensis A 1 6 7 *
Oxytropis lambertii A 6 7 *
Oxytropis lapponica A *
Oxytropis maydelliana A 6 7 *
Oxytropis megalantha A 6 7 *
Oxytropis nana K 6 *
Oxytropis podocarpa A 6 7 *
Oxytropis ruthenica A 6 7 *
Oxytropis sericea A 6 7 *
Oxytropis sericea var. spicata A 6 7 *
Oxytropis splendens A 6 7 *
Oxytropis viscida A 3 6 7 *
Packera anonyma A
Packera aurea A 3
Packera paupercula A
Packera werneriifolia A 3
Padus maackii C 8 *
Paederota bonarota L
Paeonia ?Bernice Carr' *
Paeonia ?Capital Dome' *
Paeonia ?Duchesse d'Orleans' *
Paeonia ?Martha W.' *
Paeonia ?Meadow Lark' *
Paeonia ?Pink Princess' *
Paeonia 'Adrienne Clarkson' *
Paeonia 'Blushing Princess' *
Paeonia 'Nosegay' *
Paeonia anemoniflora *
Paeonia anomala *
Paeonia anomala subsp. anomala *
Paeonia cambessedesii *
Paeonia caucasica *
Paeonia daurica *
Paeonia daurica subsp. coriifolia *
Paeonia daurica subsp. macrophylla *
Paeonia daurica subsp. mlokosewitschii *
Paeonia delavayi *
Paeonia delavayi var. lutea *
Paeonia emodi *
Paeonia handel-mazzettii *
Paeonia He Hua Ying Ri' *
Paeonia Horizon' *
Paeonia humilis *
Paeonia hybrid *
Paeonia japonica *
Paeonia kavachensis *
Paeonia lactiflora *
Paeonia lactiflora 'A la Mode' *
Paeonia lactiflora 'Betty Warner' *
Paeonia lactiflora 'Butter Bowl' *
Paeonia lactiflora 'Carrara' *
Paeonia lactiflora 'Empress Wu's Yellow' *
Paeonia lactiflora 'Gay Paree' *
Paeonia lactiflora 'Irene May Gilbert' *
Paeonia lactiflora 'Kaw Valley' *
Paeonia lactiflora 'Krinkled White' *
Paeonia lactiflora 'Moonstone' *
Paeonia lactiflora 'Nathan' *
Paeonia lactiflora 'Paul M Wild' *
Paeonia lactiflora 'Pride of Blasdell' *
Paeonia lactiflora 'Purple Spider' *
Paeonia lactiflora 'Scatterbrain Pink' *
Paeonia lactiflora 'White Wings' *
Paeonia lactiflora hybrid *
Paeonia lutea *
Paeonia Mackinac Grand' *
Paeonia mascula *
Paeonia mascula subsp. arietina *
Paeonia mascula subsp. mascula *
Paeonia mlokosewitschii *
Paeonia mlokosewitschii hybrid *
Paeonia mollis *
Paeonia obovata *
Paeonia obovata subsp. obovata *
Paeonia obovata var. alba *
Paeonia officinalis *
Paeonia officinalis 'Anemoniflora Rosea' *
Paeonia officinalis 'Anemoniflora' *
Paeonia officinalis 'Mollis' *
Paeonia officinalis ssp. microcarpa *
Paeonia officinalis subsp. banatica *
Paeonia officinalis subsp. humilis *
Paeonia officinalis subsp. villosa *
Paeonia ostii *
Paeonia peregrina *
Paeonia Rare China' *
Paeonia rockii *
Paeonia rockii cross *
Paeonia rockii hybrid *
Paeonia Souvenir de Lothar Parlasca' *
Paeonia sp. *
Paeonia Sprite' *
Paeonia steveniana *
Paeonia suffruticosa *
Paeonia suffruticosa *
Paeonia suffruticosa 'Angel Emily' *
Paeonia suffruticosa 'Baron Thyssen' *
Paeonia suffruticosa 'Brandy Wine' *
Paeonia suffruticosa 'Fuji-musume' *
Paeonia suffruticosa 'Hakushin' *
Paeonia suffruticosa 'Hana-kisoi' *
Paeonia suffruticosa 'Hoki' *
Paeonia suffruticosa 'Houki' *
Paeonia suffruticosa 'Imamurasaki' *
Paeonia suffruticosa 'Kamada-nishiki' *
Paeonia suffruticosa 'Kao' *
Paeonia suffruticosa 'Shima Nishiki' *
Paeonia suffruticosa 'Shiman Otone Mai' *
Paeonia suffruticosa 'Shimanishiki' *
Paeonia suffruticosa 'Yachiyo-tsubaki' *
Paeonia suffruticosa hybrid *
Paeonia suffruticosa subsp. ostii *
Paeonia suffruticosa subsp. rockii *
Paeonia suffruticosa subsp. rockii hybrid *
Paeonia tenuifolia G *
Paeonia tenuifolia subsp. biebersteiniana G *
Paeonia tenuifolia subsp. lithophila G *
Paeonia veitchii *
Paeonia veitchii var. woodwardii *
Paeonia Walter Mains' *
Paeonia wittmanniana *
Paeonia x suffruticosa subsp. rockii *
Panax chin-seng L *
Panax ginseng L *
Panax quinquefolius L *
Panax trifolius ! L *
Pancratium illyricum A
Panicum clandestinum A
Panicum miliaceum 'Violaceum' A
Panicum virgatum A
Panicum virgatum 'Heavy Metal' A
Panicum virgatum 'Rotstrahlbusch' A
Panicum virgatum 'Shenandoah' A
Papaver alboroseum A
Papaver alpinum A 3
Papaver amurense A
Papaver apokrinomenon A
Papaver atlanticum A
Papaver atlanticum 'Flore Pleno' A
Papaver bracteatum A
Papaver burseri A 3
Papaver cambricum ! C *
Papaver canescens A
Papaver chakassicum A
Papaver commutatum A 2
Papaver dahlianum A
Papaver dubium A 2
Papaver fauriei A 3 4
Papaver feddei A
Papaver fugax A
Papaver glaucum K 1 3
Papaver heldreichii A
Papaver kluanense A
Papaver lapeyrousianum L
Papaver lapponicum G
Papaver lateritium A 2
Papaver lateritium 'Flore Pleno' A 2
Papaver lateritium 'Nanum Flore Pleno' A 2
Papaver miyabeanum A 3 4
Papaver montanum A
Papaver nudicaule A 3
Papaver oreophilum A
Papaver orientale A
Papaver orientale 'Allegro' A
Papaver orientale 'Burning Heart' A
Papaver orientale 'Fruit Punch' A
Papaver orientale 'Patty's Plum' A
Papaver orientale 'Turkenlouis' A
Papaver orientale var. bracteatum A
Papaver paeoniflorum A 3
Papaver persicum A
Papaver pilosum A 2
Papaver pygmaeum H *
Papaver radicatum L
Papaver rhaeticum A 3
Papaver rhoeas A
Papaver rhoeas 'Fairy Wings' A
Papaver rhoeas 'Pandora' A
Papaver rhoeas (Shirley mix) A
Papaver rupifragum A
Papaver rupifragum 'Double Tangerine Gem' A
Papaver rupifragum 'Tangerine Gem' A
Papaver sendtneri A 3
Papaver somniferum A
Papaver somniferum 'Danebrog' A
Papaver somniferum 'Hen and Chickens' A
Papaver somniferum 'Lauren's Grape' A
Papaver somniferum 'Pink Chiffon' A
Papaver somniferum 'Sissinghurst White' A
Papaver somniferum (Paeoniiflorum Group) A 3
Papaver somniferum double A
Papaver somniferum Laciniatum Group A
Papaver sp. G
Papaver spicatum A
Papaver suaveolens L
Papaver tauricola A
Papaver tianschanicum A
Papaver triniifolium A
Papyrus sp. A
Paradisea liliastrum L
Paradisea lusitanica L
Paradisea sp. L
Parahebe perfoliata L
Parameconopsis cambrida ! C *
Pardancanda norrisii A 3
Pardanthopsis dichotoma A 7 *
Paris quadrifolia ! E *
Parnassia fimbriata G 3
Parnassia glauca G 3
Parnassia palustris A 3
Paronychia argentea A
Paronychia kapela ?
Paronychia kapela subsp. serpyllifolia A
Paronychia serpyllifolia A
Parthenium integrifolium H
Parthenocissus quinquefolia 'Star Showers' J
Passiflora morifolia L *
Patrinia gibbosa ! J
Patrinia glabrifolia ?
Patrinia heterophylla G
Patrinia intermedia A
Patrinia japonica A
Patrinia punctiflora A
Patrinia rupestris A
Patrinia scabiosifolia ?
Patrinia sp. ! L
Patrinia triloba A
Patrinia triloba var. palmata F
Patrinia villosa A
Patrinia villosa var. japonica A
Paulownia tomentosa A 3
Pavonia hastata A
Paxistima canbyi 'Compacta ' ! *
Pectiantia breweri A
Pectiantia ovalis A
Pectiantia pentandra E 3
Pedicularis canadensis A *
Pedicularis comosa ? *
Peganum harmala A 3 *
Pelargonium capitatum A
Pelargonium endlicherianum B
Pelargonium sp. A
Pelecyphora missouriensis A 4
Peltiphyllum peltatum E 7
Peltoboykinia sp.. *
Peltoboykinia tellimoides G 3
Peltoboykinia watanabei H
Pennisetum alopecuroides B
Pennisetum alopecuroides 'Hameln' B
Pennisetum alopecuroides 'Red Head' B
Pennisetum glaucum A
Pennisetum glaucum 'Jade Princess' A
Pennisetum glaucum 'Jester' A
Pennisetum glaucum 'Purple Majesty' A
Pennisetum macrourum A
Pennisetum setaceum 'Rubrum' A *
Pennisetum setaceum 'Sky Rocket' A
Pennisetum sp. A
Penstemon 'Dark Towers' A
Penstemon 'Midnight Masquerade' ? 3
Penstemon albertinus F
Penstemon albidus F *
Penstemon all species *
Penstemon alpinus A
Penstemon angustifolius A
Penstemon arenicola H
Penstemon aridus *
Penstemon attenuatus A 3 4
Penstemon barbatus A
Penstemon barbatus 'Coccineus' A
Penstemon barbatus 'Elfin Pink' A
Penstemon barbatus 'Iron Maiden' K
Penstemon barbatus 'Navigator' A
Penstemon barbatus Pinacolada Series A
Penstemon barbatus var. praecox f. nanus A
Penstemon barbatus var. praecox f. nanus 'Rondo' A
Penstemon barrettiae F *
Penstemon bradburyi J
Penstemon caespitosus A
Penstemon calycosus J
Penstemon campanulatus J
Penstemon cardinalis J 3
Penstemon cardwellii F 3
Penstemon cardwellii 'Floyd McMullen' F 3
Penstemon cinicola G 3
Penstemon clutei G 3
Penstemon cobaea A
Penstemon compactus G 3
Penstemon confertus J
Penstemon crandallii C
Penstemon cross ?
Penstemon Crystal' J
Penstemon cyananthus F
Penstemon Dark Towers' A
Penstemon davidsonii A
Penstemon davidsonii subsp. davidsonii A
Penstemon davidsonii v. menziesii 'Rez' A
Penstemon davidsonii var. ellipticus F
Penstemon davidsonii var. menziesii A
Penstemon davidsonii var. menziesii 'Microphyllus' A
Penstemon davidsonii var. praeteritus A
Penstemon Delfts Blue Riding Hood' J
Penstemon deustus L
Penstemon digitalis A 3
Penstemon digitalis 'Husker Red' A 3
Penstemon digitalis 'Mystica' A
Penstemon digitalis 'Onyx and Pearls' A
Penstemon eatonii L *
Penstemon ellipticus F
Penstemon eriantherus G
Penstemon eriantherus var. redactus G
Penstemon euglaucus A
Penstemon fremontii G 3
Penstemon fruticosus H
Penstemon fruticosus 'Purple Haze' A
Penstemon fruticosus hybrid G *
Penstemon fruticosus var. scouleri G *
Penstemon fruticosus var. serratus G *
Penstemon fruticosus var. serratus 'Holly' G *
Penstemon Giant Blue' A
Penstemon glaber A
Penstemon glaber subsp. alpinus A
Penstemon gormanii A
Penstemon gracilis L
Penstemon grandiflorus J
Penstemon grandiflorus 'Albus' F
Penstemon grandiflorus 'Prairie Jewel' F
Penstemon hallii A
Penstemon heterophyllus A
Penstemon hirsutus G 3
Penstemon hirsutus 'Blue Foam' G
Penstemon hirsutus 'Minima Alba ' G 3
Penstemon hirsutus f. albiflorus G 3
Penstemon hirsutus v. pygmaeus A 3
Penstemon hirsutus var. minimus G 3
Penstemon hirsutus var. pygmaeus A 3
Penstemon hirsutus var. pygmaeus f. albus A 3
Penstemon humilis J
Penstemon Hyacinth flowered' J
Penstemon kunthii A 3 4
Penstemon laricifolius L
Penstemon laricifolius subsp. ilifolius A 3 4
Penstemon linarioides L
Penstemon linarioides var. sileri L
Penstemon lyallii F
Penstemon mensarum L
Penstemon Mexicali hybrid A
Penstemon Mexicali hybrid 'Carillo Red' A
Penstemon multiflorus L
Penstemon newberryi A
Penstemon nitidus J *
Penstemon ovatus A
Penstemon pallidus G
Penstemon palmeri J 3 4
Penstemon parryi A
Penstemon patens G 3 6
Penstemon peckii L
Penstemon Pike's Peak Purple' A
Penstemon pinifolius A
Penstemon pinifolius 'Shades of Mango' A
Penstemon pink Chablis' J 3
Penstemon Prairie Dusk' A
Penstemon procerus G
Penstemon procerus subsp. formosus G
Penstemon procerus subsp. tolmiei G
Penstemon procerus var. brachyanthus 'Alba' G
Penstemon procerus var. micranthus G
Penstemon procerus var. procerus G
Penstemon procerus var. tolmiei A
Penstemon procerus x hybrid G
Penstemon pruinosus F
Penstemon Red Riding Hood' G
Penstemon Red Rocks' A
Penstemon richardsonii F
Penstemon richardsonii var. richardsonii F
Penstemon Rocky Mountain Blue' A *
Penstemon rostriflorus J
Penstemon rupicola A
Penstemon rupicola x cardwellii A
Penstemon rydbergii F
Penstemon scouleri G *
Penstemon secundiflorus G 3 4
Penstemon serrulatus G
Penstemon serrulatus 'Albus' G
Penstemon Six Hills' A
Penstemon smallii J 3
Penstemon sp. G 3
Penstemon spathulatus G
Penstemon spatulatus 'Wallowa Mts' G
Penstemon strictus A *
Penstemon thompsoniae var. desertipicti G 3
Penstemon tolmiei A
Penstemon tubaeflorus G 3
Penstemon uintahensis A
Penstemon unilateralis F
Penstemon venustus G 3
Penstemon virgatus subsp. asa-grayi L 1
Penstemon watsonii G
Penstemon whippleanus G 5
Penstemon wilcoxii A
Penstemon x mexicali A 3
Penstemon x mexicanus 'Sunburst Ruby' A
Pentanema ensifolium A
Pentanema orientale A
Penthorum sedoides L 3 *
Perilla frutescens A 3
Perilla frutescens var. crispa A 3
Perilla frutescens var. nankinensis A 3
Periploca sepium A
Persicaria bistorta E 4
Persicaria japonica var. compacta J
Persicaria orientalis A *
Persicaria orientalis 'Cerise Pearls' A *
Persicaria polymorpha J
Persicaria virginiana A
Persicaria virginiana 'Painter's Palette' A
Persicaria weyrichii L *
Petkovia orphanidea A
Petrocallis pyrenaica A
Petrocoptis all species A
Petrocoptis glaucifolia A
Petrocoptis lagascae A
Petrocoptis pyrenaica A
Petrocoptis pyrenaica subsp. glaucifolia A
Petrocoptis sp. A
Petrophytum caespitosum A
Petrophytum hendersonii L
Petrorhagia saxifraga A 3
Petroselinum crispum A 7
Petunia exserta A
Petunia x hybrida A
Peucedanum litorale A
Peucedanum ostruthium E
Peucedanum rablense G
Peucedanum sp. A
Peucedanum verticillare E
Phacelia bolanderi A
Phacelia campanularia A
Phacelia sericea A
Phacelia sp. ? 2
Phacelia tanacetifolia A 2
Phagnalon saxatile A
Phalocallis coelestis A
Phaseolus coccineus A
Phaseolus coccineus 'Painted Lady' A
Phaseolus vulgaris A
Phaseolus vulgaris 'Garden of Eden' A
Phaseolus vulgaris 'Purple Peacock' A
Phedimus ellacombeanus A
Phedimus kamtschaticus A
Phedimus kamtschaticus A
Phedimus selskianus A
Phellodendron amurense L 8
Phemeranthus brevifolius A
Phemeranthus rugospermus F
Phemeranthus sp. ?
Phemeranthus thompsonii A
Philadelphus microphyllus J
Philadelphus satsumi A *
Phlomis fruticosa A
Phlomis russeliana F
Phlomis samia A
Phlomis sp. A
Phlomis tuberosa A
Phlomoides laciniata A
Phlomoides tuberosa A
Phlox bifida ! J *
Phlox bifida 'Alba' ! J *
Phlox condensata J
Phlox drummondii A 2
Phlox drummondii 'Moody Blues' A 2
Phlox hoodii G
Phlox paniculata J
Phlox paniculata 'David' J
Phlox paniculata 'Miss Jill' J
Phlox roemeriana A
Phlox sp. J
Phlox subulata A *
Phlox Tiny Bugles' ?
Phoenicaulis cheiranthoides A 2
Phormium sp. A
Photinia melanocarpa G 7
Phryma leptostachya L *
Phuopsis stylosa A 2
Phygelius 'Cherry Ripe' A
Phygelius capensis A
Phygelius hybrid A
Phygelius x rectus 'Salmon Leap' A
Phyllis nobla ?
Phyllodoce empetriformis K
Phyllodoce sp. ? 3
Physalis alkekengi A 3 8 *
Physalis virginiana A 3 8 *
Physaria all species A
Physaria alpina A
Physaria chambersii ! L
Physaria didymocarpa A
Physaria eburniflora A
Physaria kingii A
Physaria sp. A 3
Physocarpus capitatus A
Physocarpus opulifolius L
Physocarpus opulifolius ?Diablo? L
Physochlaina orientalis F
Physochlaina praealta ?
Physoplexis comosa A 2 5
Physoptychis caspica A 2
Physoptychis gnaphalodes A 2
Physostegia virginiana A
Physostegia virginiana 'Crystal Peak White' A
Physostegia virginiana f. alba A
Physostegia virginiana var. speciosa 'Variegata' A
Phyteuma angustifolium L 3
Phyteuma betonicifolium E
Phyteuma canescens L
Phyteuma charmelii A
Phyteuma comosum A 2 5
Phyteuma confusum A 3
Phyteuma cordatum A
Phyteuma graminifolium A
Phyteuma halleri L
Phyteuma hemisphaericum A
Phyteuma nigrum A
Phyteuma orbiculare B 3
Phyteuma ovatum A
Phyteuma persicifolium J
Phyteuma scheuchzeri A
Phyteuma sieberi A
Phyteuma sp. A 3
Phyteuma spicatum L 3
Phyteuma zahlbruckneri J
Phytolacca acinosa A
Phytolacca americana G 8 *
Phytolacca americana 'Silberstein' G 8 *
Phytolacca americana 'Variegata' G 8 *
Picea abies 'Excelsa' A
Picea meyeri J 7
Pieris japonica var. amamiana A 3 *
Pieris nana K
Pilosella aurantiaca A
Pilosella officinarum A
Pimpinella major 'Rosea' ! J
Pinellia pedatisecta J
Pinellia ternata L
Pinellia tripartita ! A
Pinellia tripartita 'Atropurpurea' ! A *
Pinguicula grandiflora K
Pinguicula vulgaris A *
Pinus banksiana A 7
Pinus cembra L
Pinus koraiensis 'Silveray' J *
Pinus mugo A
Pinus parviflora G
Pinus parviflora 'Gimborn's Ideal'
Pinus parviflora 'Glauca' G
Pinus pumila G
Pinus strobus G *
Pinus strobus 'Pendula' G *
Pinus sylvestris A
Piptanthus nepalensis A 6 7
Pityopsis falcata J
Plagiorhegma dubium ! D *
Plantago afra K 3
Plantago alpina A
Plantago arborescens A
Plantago asiatica 'Variegata' A 3
Plantago coronopus A
Plantago cynops K 3
Plantago juncoides A
Plantago lanceolata A 3
Plantago major B 3
Plantago major 'Atropurpurea' B 3
Plantago major 'Rosularis ' B 3
Plantago major 'Variegata' B 3
Plantago malato-belizii F
Plantago maritima subsp.serpentina A 3
Plantago neumannii A
Plantago nivalis B
Plantago psyllium ? 3
Plantago sempervirens A
Plantago serpentina A 3
Plantago sp. L
Plantago subulata A 3
Platanthera ciliaris A 3 *
Platycodon grandiflorus A
Platycodon grandiflorus 'Albus' A
Platycodon grandiflorus 'Astra White' A
Platycodon grandiflorus 'Baby Blue' A
Platycodon grandiflorus 'Double Blue' A
Platycodon grandiflorus 'Fairy Snow' (Apoyama Group) A
Platycodon grandiflorus 'Fairy White' A
Platycodon grandiflorus 'Fuji Pink' A
Platycodon grandiflorus 'Fuji White' A
Platycodon grandiflorus 'Hakone Blue' A
Platycodon grandiflorus 'Hakone Double Blue' A
Platycodon grandiflorus 'Hakone White' A
Platycodon grandiflorus 'Hakone' A
Platycodon grandiflorus 'Henisborne White' A
Platycodon grandiflorus 'Nanus' A
Platycodon grandiflorus 'Sentimental Blue' A
Platycodon grandiflorus (Apoyama Group) A
Platycodon grandiflorus var. mariesii A 3
Platycodon sp. A
Plectranthus scutellarioides A
Pleione bulbocodioides B *
Pleione formosana B *
Pleione limprichtii B *
Pleurospermum austriacum L *
Poa alpina A
Podophyllum cymosum ! H *
Podophyllum delavayi ! J *
Podophyllum emodi ! E 8 *
Podophyllum hexandrum E 4 8 *
Podophyllum peltatum ! L 8 *
Podophyllum pleianthum ! G *
Podophyllum versipellis subsp. boreale ! A *
Polanisia dodecandra A 2
Polemonium 'Blue Pearl' A 3
Polemonium amberoersii A
Polemonium boreale B
Polemonium boreale 'Heavenly Habit' B
Polemonium brandegeei A
Polemonium caeruleum A
Polemonium caeruleum 'Snow and Sapphires' A
Polemonium caeruleum f. album A
Polemonium caeruleum ssp. caeruleum f. album A
Polemonium caeruleum subsp. dissectum f. album A
Polemonium caeruleum var. himalayanum A
Polemonium californicum F
Polemonium confertum var. imium A
Polemonium elegans B
Polemonium eximium A
Polemonium flavum B
Polemonium foliosissimum A
Polemonium foliosissimum var. flavum A
Polemonium kiushianum B
Polemonium mellitum A 2
Polemonium pauciflorum A
Polemonium pauciflorum subsp. hinckleyi A
Polemonium pulcherrimum A 3
Polemonium pulcherrimum var. pulcherrimum A 3
Polemonium reptans J
Polemonium sp. B
Polemonium vanbruntiae J
Polemonium viscosum A
Polemonium yezoense A
Polemonium yezoense var. hidakanum 'Purple Rain' A
Polygala alpestris A
Polygala chamaebuxus A *
Polygala comosa A 3
Polygala major A
Polygala sp. ?
Polygonatum biflorum A 8
Polygonatum biflorum 'Nanum' A 8
Polygonatum hirtum ? 8
Polygonatum humile A 2 8 *
Polygonatum odoratum L 8 *
Polygonatum officinale L 8 *
Polygonatum prattii J *
Polygonatum pubescens ! D 8 *
Polygonatum sibiricum ! J 4 *
Polygonatum sp. D 8
Polygonatum verticillatum K *
Polygonatum zanlanscianense L 8 *
Polygonatum zanlanscianense ssp. officinalis L 8 *
Polygonum affine ?
Polygonum bistorta E 4
Polygonum bistorta 'Superbum' E 4
Polygonum japonicum var. japonicum J
Polygonum orientale A *
Polygonum persicaria A
Polygonum sp. G
Polygonum viviparum B
Polygonum weyrichii L *
Polypodium penna-marina A *
Polypodium virginianum A *
Polystichum acrostichoides A *
Polystichum tsus-simense A *
Poncirus trifoliata ! A
Pontederia cordata K *
Porteranthus stipulatus E
Porteranthus trifoliatus F
Portulaca grandiflora A
Portulaca hybrids A
Portulaca oleracea A
Portulaca umbraticola A
Potentilla alba A
Potentilla alba 'Snow White' A
Potentilla alchemilloides A
Potentilla ambigua A
Potentilla ancistrifolia var. dickinsii A
Potentilla arguta G
Potentilla argyrophylla A
Potentilla atrosanguinea A
Potentilla aurea A
Potentilla breweri A
Potentilla bruceae A
Potentilla concinna A
Potentilla coriandrifolia J 4
Potentilla crantzii A
Potentilla crantzii 'Pygmaea' A
Potentilla cuneata A
Potentilla delavayi A
Potentilla dickinsii A
Potentilla dissecta A
Potentilla dombeyi A
Potentilla drummondii A
Potentilla egedii A
Potentilla elatior subsp. pallasii ?
Potentilla eriocarpa ?
Potentilla fissa A
Potentilla fragiformis A
Potentilla fruticosa A
Potentilla fruticosa var. pyrenaica A
Potentilla geranioides v. geranioides ? A
Potentilla Gibson's Scarlet' A
Potentilla glandulosa F
Potentilla glandulosa var. fissa A
Potentilla gracilis A
Potentilla hippiana F
Potentilla hyparctica F
Potentilla hyparctica 'Nana' F
Potentilla hyparctica subsp. nana F
Potentilla inclinata A
Potentilla kardiya A
Potentilla megalantha A 3
Potentilla Monarch Velvet' A
Potentilla multifidiformis A
Potentilla nana J 4
Potentilla nepalensis A
Potentilla nepalensis 'Miss Willmott' A
Potentilla neumanniana L
Potentilla neumanniana 'Nana' L
Potentilla nivea F
Potentilla palustris F
Potentilla pamirica A
Potentilla pensylvanica var. littoralis A
Potentilla porphyrantha A
Potentilla porphyrantha x caucasica A
Potentilla pusilla F
Potentilla recta A 3
Potentilla rupestris A 3
Potentilla rupestris var. pygmaea A 3
Potentilla sp. L
Potentilla speciosa B
Potentilla taurica ?
Potentilla thurberi A
Potentilla thurberi 'Monarch's Velvet' A
Potentilla thurberi hybrid A
Potentilla tollii J 3
Potentilla tonguei A
Potentilla tridentata A
Potentilla uniflora A
Potentilla verna L
Potentilla verna var. nana L
Potentilla villosa A
Poterium lasiocarpum A 3
Pratia angulata L
Prenanthes alba G
Prenanthes altissima L
Prenanthes trifoliolata ?
Primula acaulis E
Primula algida A
Primula all species L *
Primula alpicola A
Primula amoena A
Primula angustifolia L
Primula apennina E
Primula aurantiaca A
Primula auricula ! A
Primula auricula 'Craig Dhu' ! G
Primula auricula subsp. bauhinii ! A
Primula auricula var. albocincta ! A
Primula auriculata A
Primula Barnhaven Gold Laced Group A
Primula beesiana A
Primula brevicula A
Primula bulleyana A
Primula burmanica H
Primula Candelabra hybrid A
Primula capitata A
Primula carniolica G
Primula cawdoriana ! G
Primula chionantha ! A
Primula chungensis K
Primula clusiana A
Primula cockburniana A
Primula cordifolia ? 3 4
Primula cortusoides ! A
Primula daonensis A
Primula darialica A
Primula denticulata ! A
Primula denticulata 'Crimson Emperor' ! A
Primula denticulata 'Red Emperor' ! A
Primula denticulata 'Rubin Selection' ! A
Primula denticulata 'Rubinball' ! A
Primula denticulata var. alba ! A
Primula discolor L
Primula elatior A
Primula elatior subsp. pallasii A
Primula elliptica A
Primula erythrocarpa G
Primula farinosa A
Primula florindae A
Primula forbesii ! A 4 *
Primula frondosa D
Primula glaucescens A
Primula glutinosa A
Primula Gold-laced Group E
Primula grandis K
Primula halleri ! A
Primula heucherifolia A
Primula hirsuta E
Primula hirsuta hybrid E
Primula hybrid G
Primula involucrata ! A
Primula japonica G
Primula japonica 'Alba' G
Primula japonica 'Carminea' G
Primula japonica 'Glowing Embers ' G
Primula japonica 'Miller's Crimson' G
Primula japonica 'Postford White' G
Primula jeffreyi G
Primula jesoana J
Primula kisoana A 3
Primula kisoana var. alba A 3
Primula latifolia G
Primula laurentiana ! A
Primula Lilian Harvey' E
Primula longiflora A
Primula luteola ! F
Primula macrocalyx A 3 4
Primula macrophylla A
Primula macrophylla var. moorcraftiana A
Primula marginata ! A
Primula marginata 'Napoleon' ! A
Primula matthioli A
Primula matthioli ssp. sachaliensis A
Primula matthioli ssp. matthioli A
Primula matthioli ssp. turkestanica A
Primula maximowiczii L
Primula meadia F *
Primula meadia f. alba F *
Primula meadia v. alba F *
Primula melanops G
Primula minima A
Primula mistassinica A
Primula mistassinica var. macropoda ! A
Primula mix G
Primula modesta A
Primula mollis A 4
Primula muscarioides A
Primula nivalis G
Primula nivalis var. colorata G
Primula obconica A 3
Primula palinuri G
Primula pallasii A
Primula parryi G 4
Primula pauciflora f. alba A 2 *
Primula pedemontana E
Primula poissonii A
Primula polyneura A
Primula primulina G
Primula prolifera A
Primula pulverulenta A 3
Primula rosea ! A
Primula rosea 'Gigas' ! A
Primula rosea 'Grandiflora' ! A
Primula rotundifolia ? 3 4
Primula Rowallane Rose' ! E
Primula ruprechtii L
Primula saguramica ?
Primula saxatilis ! A
Primula scandinavica A
Primula scotica A
Primula secundiflora A
Primula sieboldii ! D 2 4 *
Primula sieboldii 'Geisha Girl' ! D 2 4 *
Primula sikkimensis A *
Primula sp. G
Primula spectabilis G
Primula stricta G
Primula veris A 3 4
Primula veris hybrid A 3 4
Primula veris subsp. macrocalyx A 3 4
Primula vialii A
Primula villosa G
Primula villosa var. commutata G
Primula vulgaris E
Primula vulgaris subsp. sibthorpii E
Primula vulgaris x veris E
Primula waltonii A
Primula Wanda Group J
Primula wilsonii J 3
Primula woronowii ! A
Primula wulfeniana G
Primula x bulleesiana G
Primula x discolor L
Primula x polyantha A
Primula x pruhonicensis A
Primula x pubescens B
Primula x pubescens 'Boothman's Variety' G
Primula x pubescens 'Christine' G
Primula x pubescens 'Exhibition Blue' G
Primula x pubescens 'Mrs J.H. Wilson' G
Primula x pubescens mixed G
Primula yuparensis J
Prinsepia chinensis G 2
Prinsepia sinensis G
Prinsepia uniflora G 2
Proboscidea louisianica A
Prosartes hookeri H 3 8
Prosartes maculata D
Prosopis glandulosa A 6 *
Prospero autumnale G *
Prunella grandiflora B
Prunella grandiflora 'Alba' B
Prunella grandiflora 'Pink Loveliness' B
Prunella laciniata ! A
Prunella vulgaris A
Prunella x pinnatifida ! A
Prunus besseyi H
Prunus maackii C 8 *
Prunus Marion Jarvie's *
Prunus pumila G
Prunus sp. G
Prunus spinosa E
Prunus tomentosa L 8
Prunus virginiana H 8 *
Prunus virginiana var. demissa H 8 *
Psephellus bellus A
Pseudocydonia sinensis G 3
Pseudofumaria alba ! E 3 *
Pseudofumaria alba subsp. acaulis ! A 3 *
Pseudofumaria lutea ! E 3 *
Pseudofumaria ochroleuca ! A 3 *
Pseudognaphalium obtusifolium A 3
Pseudomertensia racemosa A
Pseudomuscari azureum L *
Ptelea trifoliata G
Ptelea trifoliata 'Aurea' G
Pterocarya fraxinifolia G 7
Pterocarya stenoptera G 7
Pterocephalus dumetorum A
Pterocephalus dumetorus A
Pterocephalus perennis A
Pterocephalus perennis subsp. perennis A
Pterocephalus pinardii A 3
Pterocephalus spathulatus G
Pterostyrax hispidus G
Ptilostemon afer A
Ptilostemon diacantha A
Ptilotrichum all species A
Ptilotrichum macrocarpum A
Ptilotrichum spinosum A 3
Ptilotrichum spinosum 'Roseum' A 3
Ptilotus exaltatus 'Joey' A
Pulicaria dysenterica A
Pulmonaria obscura A
Pulmonaria officinalis E
Pulmonaria saccharata E
Pulsatilla alba ! E 9
Pulsatilla albana ! A 9
Pulsatilla albana 'Lutea' ! A 9
Pulsatilla alpina ! A 9
Pulsatilla alpina 'Sulphurea' ! A 9
Pulsatilla alpina subsp. apiifolia ! A 9
Pulsatilla ambigua ! A 9
Pulsatilla armena ! A 9
Pulsatilla aurea ! A 9
Pulsatilla bungeana ! A 9
Pulsatilla campanella ! A 9
Pulsatilla caucasica ! A 9
Pulsatilla caucasica 'Lutea' ! A 9
Pulsatilla cernua ! A 9
Pulsatilla chinensis ! A 9
Pulsatilla dahurica ! A 9
Pulsatilla flavescens ! A 9
Pulsatilla georgica ! A 9
Pulsatilla grandis ! A 9
Pulsatilla halleri ! A 9
Pulsatilla halleri subsp. grandis ! A 9
Pulsatilla halleri subsp. slavica ! A 9
Pulsatilla halleri subsp. styriaca ! A 9
Pulsatilla mix ! L 9
Pulsatilla montana ! A 9
Pulsatilla nigricans ! L 9
Pulsatilla nuttalliana ! A
Pulsatilla occidentalis ! L 9
Pulsatilla oenipontana ! L 9
Pulsatilla patens ! A 9
Pulsatilla patens subsp. flavescens ! A 9
Pulsatilla patens subsp. multifida ! A 9
Pulsatilla patens subsp. patens ! A 9
Pulsatilla pratensis ! A 9
Pulsatilla pratensis hybrid ! A 9
Pulsatilla pratensis 'Semiplena ' ! A 9
Pulsatilla pratensis subsp. bohemica ! A 9
Pulsatilla pratensis subsp. nigricans ! A 9
Pulsatilla regeliana ! A 9
Pulsatilla rubra ! A 9
Pulsatilla serotina ! A 9
Pulsatilla slavica ! A 9
Pulsatilla slavica x grandis ! A 9
Pulsatilla sp. ! L 9
Pulsatilla styriaca ! A 9
Pulsatilla sukaczewii ! A 9
Pulsatilla tatewakii ! A 9
Pulsatilla turczaninovii ! A 9
Pulsatilla ucrainica ! A 9
Pulsatilla vernalis ! A 9
Pulsatilla violacea ! A 9
Pulsatilla vulgaris ! A 9
Pulsatilla vulgaris 'Alba' ! A 9
Pulsatilla vulgaris 'Barton's Pink' ! A 9
Pulsatilla vulgaris 'Flore Pleno' ! A 9
Pulsatilla vulgaris 'Rode Klokke' ! A 9
Pulsatilla vulgaris 'Rote Glocke' ! A 9
Pulsatilla vulgaris subsp. grandis ! A 9
Pulsatilla vulgaris subsp. grandis 'Budapest Blue' ! A 9
Pulsatilla vulgaris subsp. grandis 'Papagen' ! A 9
Pulsatilla vulgaris var. gotlandica ! A 9
Pulsatilla vulgaris var. rubra ! A 9
Pulsatilla x holubyana ! A 9
Pulsatilla zimmermannii ! A 9
Puschkinia scilloides L *
Puschkinia scilloides 'Alba' L *
Puschkinia scilloides var. libanotica 'Alba' L *
Putoria calabrica D
Pycnanthemum pilosum A
Pycnanthemum tenuifolium A 3
Pycnanthemum verticillatum v. pilosum A
Pycnanthemum virginianum G
Pycnosorus globosus A 3
Pyracantha rogersiana G 7 8 *
Pyrethrum grandiflorum A
Pyrethrum James Kelway' A 3
Pyrethrum leontopodium A
Pyrethrum macrophyllum A
Pyrethrum pulchrum K
Pyrethrum sp. K
Pyrola minor ? *
Pyrola rotundifolia ? *
Pyrrosia serpens J
Pyrus calleryana 'Chanticleer' L *
Pyrus salicifolia L
Quamoclit pennata A 6 7
Quercus macrocarpa ! H
Quercus muehlenbergii A *
Quercus rubra L
Rabdosia umbrosa var. leucantha ?
Ramonda all species A
Ramonda myconi ! B 3 *
Ramonda myconi 'Rosea' ! B 3 *
Ramonda myconi var. alba ! B 3 *
Ramonda serbica ! A 3 *
Ramonda sp. ! A 3 *
Ranunculus aconitifolius ! E
Ranunculus acris 'Citrinus' ! J *
Ranunculus amplexicaulis ! E
Ranunculus bulbosus ! A
Ranunculus cortusifolius ! B
Ranunculus crenatus ! L
Ranunculus glacialis ! E 5
Ranunculus gramineus ! F
Ranunculus hybridus ! E
Ranunculus lyallii ! E
Ranunculus millefoliatus ! L *
Ranunculus montanus 'Molten Gold' ! L
Ranunculus obtusilobus ! L
Ranunculus parnassifolius ! E
Ranunculus pseudohirculus ! L
Ranunculus pyrenaeus ! E
Ranunculus sp. ! L
Ranunculus thora ! ?
Ranunculus yakushimensis ! L *
Ranzania japonica ! L *
Raoulia australis A 3
Raphanus sativus 'Rat's Tail' A
Ratibida columnifera A
Ratibida columnifera f. pulcherrima A
Ratibida columnifera f. pulcherrima 'Red Midget' A
Ratibida pinnata A
Ratibida pulcherrima A
Ratibida sp. A
Rehmannia elata A
Rehmannia elata 'Popstar' A
Rehmannia glutinosa A
Reseda alba A
Reseda lutea A
Reseda luteola A 3
Reseda odorata A
Reseda odorata 'Machet' N *
Rhamnus pumila J
Rhaponticum carthamoides A
Rhaponticum chamarensis J *
Rhaponticum coniferum A
Rhaponticum scariosum ssp. rhaponticum ?
Rheum maximowiczii ?
Rheum palmatum A
Rheum palmatum 'Atropurpureum Dissectum ' A
Rheum palmatum 'Atrosanguineum' A
Rheum palmatum var. tanguticum A
Rheum rhabarbarum K
Rheum tanguticum A 6 *
Rheum tataricum K
Rheum wittrockii ?
Rhinanthus minor G *
Rhinanthus serotinus G *
Rhinopetalum stenantherum L *
Rhipsalis pilocarpa A
Rhodiola integrifolia A 3
Rhodiola iremelica L 3
Rhodiola ishidae L
Rhodiola japonica A
Rhodiola kirilowii A 3
Rhodiola kirilowii v. rubra A 3
Rhodiola linearifolia A
Rhodiola rhodantha A 3
Rhodiola rosea A 3
Rhodiola sibirica A
Rhodiola sp. J
Rhodochiton atrosanguineum A
Rhododendron albiflorum A *
Rhododendron all species 3 *
Rhododendron April Rose' A *
Rhododendron April White' A *
Rhododendron arborescens A *
Rhododendron Barry Rodgers' A *
Rhododendron brachycarpum A *
Rhododendron brachycarpum subsp. tigerstedtii A *
Rhododendron camtschaticum ! A *
Rhododendron canadense A *
Rhododendron caucasicum A *
Rhododendron dauricum A *
Rhododendron dauricum 'Album' A *
Rhododendron dauricum 'Hokkaido' A *
Rhododendron Dexter hybrid A *
Rhododendron ferrugineum A *
Rhododendron Gibraltar' A *
Rhododendron impeditum A *
Rhododendron intermedium A *
Rhododendron kiusianum A *
Rhododendron lapponicum ! A 3 *
Rhododendron litangense A *
Rhododendron luteum A *
Rhododendron macrophyllum A *
Rhododendron micranthum A *
Rhododendron minus 'Alba' A *
Rhododendron minus var. minus (Carolinianum Group) A *
Rhododendron mucronulatum A *
Rhododendron neriiflorum A *
Rhododendron Nova Zembla' A *
Rhododendron ponticum A *
Rhododendron racemosum A *
Rhododendron reticulatum A *
Rhododendron schlippenbachii A *
Rhododendron sp. A *
Rhododendron tomentosum ! A 3 *
Rhododendron vernicosum A *
Rhododendron x intermedium A *
Rhododendron x yakushimanum A *
Rhodohypoxis baurii L
Rhodothamnus chamaecistus L *
Rhodotypos scandens *
Rhus aromatica K *
Rhus trilobata G 6 *
Rhynchelytrum repens A
Rhynchospora colorata A *
Ribes cereum L 4 8 *
Richteria leontopodium A 6 7
Ricinus communis A 6 7
Ricinus communis 'Carmencita Bright Red' A 6 7
Ricinus communis 'Carmencita Red' A 6 7
Ricinus communis 'Carmencita' A 6 7
Ricinus communis 'New Zealand Purple' A 6 7
Ricinus sp. A 6 7
Ricinus zanzibarensis A 6 7
Robinia pseudoacacia 'Bessoniana' A 6 7
Robinia pseudoacacia 'Frisia' A 6 7
Rodgersia aesculifolia A 3
Rodgersia aesculifolia var. henricii A 3
Rodgersia all species *
Rodgersia henricii A 3
Rodgersia pinnata A 3
Rodgersia pinnata 'Superba' A
Rodgersia podophylla A
Rodgersia sambucifolia A 3
Rodgersia sp. A
Rodgersia tabularis A 3
Romanzoffia tracyi ! A
Romneya coulteri F 5 *
Romulea nivalis ?
Romulea ramiflora A
Romulea sp. ?
Rosa ?Geranium? D 8 *
Rosa all species 6 7 8 *
Rosa amblyotis D 8 *
Rosa beggeriana Schrenk D 4 8 *
Rosa blanda D 8 *
Rosa camtschatica D 8 *
Rosa canina D 8 *
Rosa carolina D 8 *
Rosa carpatica D 8 *
Rosa davurica var. davurica D 8 *
Rosa ecae D 8 *
Rosa fedtschenkoana D 8 *
Rosa glauca D 8 *
Rosa laxa D 8 *
Rosa lucieae var. onoei D 8 *
Rosa maximowicziana D 8 *
Rosa mollis D 8 *
Rosa multiflora L 6 *
Rosa ovczinnikovii D 8 *
Rosa pulverulenta D 8 *
Rosa rubrifolia D 8 *
Rosa rugosa D 8 *
Rosa sp. D 8 *
Rosa villosa D 8 *
Rosa virginiana D 8 *
Rosa webbiana C 8 *
Rosa wichurana D 8 *
Rosa willdenowii D 8 *
Rosa woodsii D 8 *
Rosa x camtschatica D 8 *
Rosa xanthina C 6
Roscoea alpina A 2
Roscoea auriculata A 2
Roscoea cautleyoides A
Roscoea humeana J
Roscoea purpurea A
Roscoea schneideriana A
Roscoea scillifolia f. atropurpurea A 7
Roscoea scilloides A
Roscoea tibetica A
Rosularia chrysantha A
Rosularia libanotica A
Rosularia muratdaghensis A
Rosularia pilosa A 3 4
Rosularia sedoides A 3
Rosularia sempervivoides A
Rosularia sempervivum A
Rosularia serrata ? 3 4
Rosularia sp. ? 3
Rubus allegheniensis C *
Rubus chamaemorus L 6
Rubus odoratus J
Rubus parviflorus L
Rudbeckia amplexicaulis A
Rudbeckia fulgida A
Rudbeckia fulgida var. sullivantii 'Goldsturm' B
Rudbeckia gloriosa A
Rudbeckia hirta A
Rudbeckia hirta 'Becky' A
Rudbeckia hirta 'Cherokee Sunset' A
Rudbeckia hirta 'Cherry Brandy' A *
Rudbeckia hirta 'Indian Summer' A
Rudbeckia hirta 'Maya' A
Rudbeckia hirta 'Sahara' A
Rudbeckia Hortensis' A
Rudbeckia laciniata A
Rudbeckia laciniata 'Herbstsonne' A
Rudbeckia maxima F
Rudbeckia mix A
Rudbeckia nitida A
Rudbeckia sp. A
Rudbeckia subtomentosa A
Rudbeckia subtomentosa 'Little Henry' A
Rudbeckia triloba F
Rudbeckia triloba 'Prairie Glow' F
Ruellia caroliniensis G
Ruellia ciliata f. depressa A
Ruellia humilis G *
Ruellia simplex A
Ruellia sp. A
Ruellia tweediana 'Katie' A
Rumex acetosella A
Rumex alpinus A
Rumex maderensis ?
Rumex sanguineus A
Rumex sanguineus var. sanguineus A
Rumex venosus L
Rupicapnos africana C 4
Ruta graveolens A 2
Ruta graveolens 'Jackman's Blue' A 2
Sagina nodosa ?
Sagina sp. L
Sagittaria latifolia A 6 *
Saintpaulia hybrid A
Salix hylematica ! ? *
Salix lindleyana ! ? *
Salix myrtilloides 'Pink Tassels' ! ? *
Salix nepalensis ! ? *
Salpiglossis Casino Black' A
Salpiglossis sinuata A 2
Salpiglossis sinuata 'Bolero Mixed' A 2
Salpiglossis sp. A 2
Salvia aethiopis J
Salvia all species *
Salvia argentea A 3
Salvia austriaca A
Salvia bulleyana A
Salvia caespitosa B
Salvia candidissima A
Salvia candidissima subsp. occidentalis A
Salvia canescens var. daghestanica A 3
Salvia Cardinal Red' A
Salvia castanea A
Salvia coccinea A 3
Salvia coccinea 'Coral Nymph' A 3
Salvia coccinea 'Lady in Red' A 3
Salvia coccinea 'Summer Jewel Pink' A 3
Salvia coccinea 'Summer Jewel Red' A 3
Salvia coerulea A
Salvia cyanescens L 3
Salvia daghestanica A 3
Salvia deserta A
Salvia dolichantha A 3
Salvia dorrii A
Salvia dumetorum A 3
Salvia evansiana A 3
Salvia exserta A
Salvia farinacea A
Salvia farinacea 'Evolution Violet' A
Salvia farinacea 'Victoria' A
Salvia flava A
Salvia forsskaolei B 3
Salvia fruticosa A
Salvia glutinosa A 3
Salvia greggii A
Salvia guaranitica A
Salvia guaranitica 'Black and Blue' A
Salvia hians A 3
Salvia horminum A
Salvia hybrid A
Salvia hypargeia A
Salvia japonica A
Salvia jurisicii A
Salvia lavandulifolia A
Salvia lyrata A
Salvia lyrata 'Purple Knockout' A
Salvia lyrata 'Purple Volcano' A
Salvia mekongensis A 3
Salvia miltiorrhiza A 3
Salvia nemerosa 'Caradonna' A
Salvia nemorosa A
Salvia nemorosa 'New Dimension Rose' A
Salvia nemorosa 'Ostfriesland' A
Salvia nemorosa 'Rose Queen' A
Salvia nemorosa 'Violet Queen' A
Salvia nemorosa subsp. tesquicola A 3
Salvia nutans A
Salvia officinalis A
Salvia patens B 3
Salvia patens 'Oxford Blue' B
Salvia praeclara A
Salvia pratensis A
Salvia pratensis 'Rose Rhapsody' (ballet Series) A
Salvia regeliana A
Salvia roemeriana A
Salvia scabra A
Salvia sclarea A
Salvia sclarea 'Vatican White' A
Salvia sclarea var. turkestanica A
Salvia sp. A
Salvia splendens A
Salvia splendens 'Blaze of Fire' A
Salvia splendens 'Lighthouse Red' A
Salvia staminea A
Salvia stenophylla A
Salvia stepposa A 3
Salvia subrotunda A 3
Salvia superba A
Salvia tomentosa A
Salvia transsylvanica A
Salvia uliginosa A
Salvia verticillata A
Salvia virgata A
Salvia viridis A
Salvia x 'Big Swing' A
Salvia x sylvestris A
Salvia x sylvestris 'Blue Queen' A
Salvia x sylvestris 'May Night' A
Salvia yangii 'Blue Jean Baby' A
Sambucus caerulea J 6
Sambucus callicarpa J
Sambucus canadensis C
Sambucus ebulus C 8
Sambucus nigra E
Sambucus racemosa J
Sambucus sieboldiana G 8
Sandersonia aurantiaca A 3 7
Sanguinaria canadensis ! L *
Sanguinaria canadensis 'Rosea' ! L *
Sanguisorba albiflora L
Sanguisorba armena G
Sanguisorba canadensis A
Sanguisorba Chocolate Tip' A 3
Sanguisorba dodecandra K 3
Sanguisorba hakusanensis B
Sanguisorba Little Angel' K 3
Sanguisorba menziesii A
Sanguisorba minor A
Sanguisorba obtusa B
Sanguisorba officinalis A 3
Sanguisorba officinalis 'Red Thunder' A 3
Sanguisorba officinalis 'Tanna' A 3
Sanguisorba officinalis v. microcephala 'Little Angel' A 3
Sanguisorba officinalis var. microcephala 'Little Angel' A 3
Sanguisorba parviflora B
Sanguisorba purpurea B
Sanguisorba sp. L
Sanguisorba stipulata *
Sanguisorba tenuifolia B
Sanguisorba tenuifolia 'Purpurea' B
Sanguisorba tenuifolia var. alba B
Sanguisorba x tenuifolia B
Sanicula europaea ! L
Santolina chamaecyparissus 'Santa ' A
Santolina rosmarinifolia subsp. rosmarinifolia 'Primrose Gem' A
Santolina sp. L
Saponaria 'Bressingham Pink' A 3
Saponaria boissieriana A
Saponaria caespitosa L
Saponaria chlorifolia L
Saponaria cypria A
Saponaria ocymoides A 3
Saponaria ocymoides 'Rubra Compacta' A 3
Saponaria officinalis E
Saponaria pamphylica A
Saponaria pumilio E
Saponaria Rose Gnome' ?
Saponaria sp. A
Saponaria x lempergii 'Max Frei' A
Saponaria X olivana A
Sarracenia purpurea G 3 *
Saruma henryi ! E *
Satureja alpina A 3
Satureja spicata A
Sauromatum venosum A
Saururus chinensis J
Saussurea alpina J
Saussurea calcicola ?
Saussurea ceratocarpa var. depressa ! L
Saussurea discolor ?
Saussurea grandiflora ! L
Saussurea jacea ?
Saussurea nepalensis ! L
Saussurea pygmaea ?
Saussurea sp. ! L
Saxifraga 'Lilac Time' ! L *
Saxifraga 'Winifred Bevington' ! E *
Saxifraga aizoides ! D *
Saxifraga aizoon ! A 3 *
Saxifraga aizoon 'Rosea' ! A 3 *
Saxifraga all species ! *
Saxifraga arendsii ! A 3 *
Saxifraga Aureopunctata' ! E *
Saxifraga Baldensis' ! A 3 *
Saxifraga Bob Hawkins' ! E *
Saxifraga bronchialis ! L *
Saxifraga callosa ! L 3 *
Saxifraga Canis-dalmatica ' (? gaudinii) ! ? 4 *
Saxifraga cernua ! L *
Saxifraga cespitosa ! H *
Saxifraga cespitosa subsp. emarginata ! H *
Saxifraga cochlearis 'Minor' ! E *
Saxifraga cotyledon ! E *
Saxifraga crustata ! L *
Saxifraga cuneifolia ! E *
Saxifraga cymbalaria ! A *
Saxifraga diapensioides ! E *
Saxifraga exarata ! E *
Saxifraga federici-augusti subsp. grisebachii ! L *
Saxifraga ferdinandi-cobugi var. radoslavoffii ! E *
Saxifraga ferdinandi-coburgi ! E *
Saxifraga flagellaris ! A 3 *
Saxifraga granulata ! E *
Saxifraga grisebachii ! L *
Saxifraga groenlandica ! H *
Saxifraga Haagii' ! L *
Saxifraga hostii ! E *
Saxifraga hostii ssp. rhaetica ! E *
Saxifraga integrifolia ! G *
Saxifraga irrigua ! K *
Saxifraga Kabschia hybrid ! G 3 *
Saxifraga keptaniana ! L *
Saxifraga kolenatiana ! A *
Saxifraga Korund' ! L *
Saxifraga Letchworth Gem' ! L *
Saxifraga longifolia ! L *
Saxifraga lutea ! A 3 *
Saxifraga luteoviridis ! L *
Saxifraga manshuriensis ! A 3 4 *
Saxifraga marginata 'Jaroslav Horny' E *
Saxifraga Minor' ! E *
Saxifraga Mossy hybrid ! L *
Saxifraga nivalis ! A *
Saxifraga oppositifolia ! D 4 *
Saxifraga oppositifolia 'Vaccariana' ! D 4 *
Saxifraga paniculata ! A 3 *
Saxifraga paniculata 'Correvoniana' ! A 3 *
Saxifraga paniculata 'Labradorica' ! A 3 *
Saxifraga paniculata 'Laestadii' ! A 3 *
Saxifraga paniculata 'Lagraveana' ! A 3 *
Saxifraga paniculata 'Lutea' ! A 3 *
Saxifraga paniculata 'Minima' ! A 3 *
Saxifraga paniculata 'Punctata' ! A 3 *
Saxifraga paniculata 'Punctatissima' ! A 3 *
Saxifraga paniculata 'Rex' ! A 3 *
Saxifraga paniculata 'Rosea' ! A 3 *
Saxifraga paniculata 'Venetia' ! A 3 *
Saxifraga paniculata ssp. laestadii ! A 3 *
Saxifraga paniculata var. baldensis ! A 3 *
Saxifraga paniculata var. brevifolia ! A 3 *
Saxifraga paniculata var. minutifolia ! A *
Saxifraga paniculata var. paniculata ! A 3 *
Saxifraga paniculata var. petrophila ! A 3 *
Saxifraga pensylvanica ! G 3 *
Saxifraga Peter Pan' ! A *
Saxifraga porophylla ! L *
Saxifraga portae ! A 3 *
Saxifraga primuloides ! A 3 *
Saxifraga retusa subsp. augustana ! L *
Saxifraga rosacea ! A 3 *
Saxifraga rotundifolia ! A 3 *
Saxifraga sachalinensis ! E *
Saxifraga Sieberi' ! ? *
Saxifraga Southside Seedling' ! L *
Saxifraga sp. ! L *
Saxifraga sp. encrusted ! E 3 *
Saxifraga stellaris ! L *
Saxifraga stelleriana ! L *
Saxifraga stolonifera 'Maroon Beauty' ! A *
Saxifraga stribrnyi ! E *
Saxifraga sulphurea ! L *
Saxifraga tolmiei ! A *
Saxifraga tolmiei var. tolmiei ! A *
Saxifraga tricuspidata ! A *
Saxifraga Tumbling Waters' ! L *
Saxifraga umbrosa ! E *
Saxifraga Variegata Aurea' ! E 3 *
Saxifraga vayredana ! L *
Saxifraga virginiensis ! A 3 *
Saxifraga White Pixie' ! L *
Saxifraga Whitehill' ! ? *
Saxifraga x arendsii ! A 3 *
Saxifraga x arendsii 'Purple Robe' ! A 3 *
Saxifraga x boydii 'Sulphurea' ! L *
Saxifraga x fritschiana ! L *
Saxifraga x fritschiana 'Portae' ! A 3 *
Saxifraga x macnabiana ! A *
Saxifraga x patens 'Elliot's Variety' ! L *
Saxifraga x urbium ! E 3 *
Saxifraga x urbium 'Variegata' ! E 3 *
Scabiosa alpina ! A
Scabiosa atropurpurea A
Scabiosa atropurpurea 'Black Knight' A
Scabiosa caucasica A
Scabiosa caucasica 'Fama' A
Scabiosa caucasica 'Perfecta Alba' A
Scabiosa caucasica (House's hybrids) A
Scabiosa Chile Black' A
Scabiosa columbaria A
Scabiosa columbaria 'Alpina' A
Scabiosa columbaria 'Nana' A
Scabiosa columbaria subsp. ochroleuca A
Scabiosa columbaria subsp. ochroleuca 'Moon Dance' A
Scabiosa crenata A
Scabiosa dallaportae A
Scabiosa fischeri A
Scabiosa graminifolia F
Scabiosa japonica A
Scabiosa japonica var. alpina A
Scabiosa japonica var. alpina 'Ritz Blue' A
Scabiosa lucida A *
Scabiosa montana A
Scabiosa ochroleuca A
Scabiosa pink Mist' A
Scabiosa sp. A
Scabiosa stellata A
Scabiosa triandra A
Scabiosa ucranica A
Scabiosa vestina A
Schisandra chinensis A 7
Schivereckia doerfleri A 2
Schivereckia podolica E
Schivereckia sp. A
Schizachyrium scoparium A
Schizachyrium scoparium 'The Blues' A
Schizanthus grahamii A 2
Schizonepeta kokanica L
Schizophragma hydrangeoides A
Schizophragma hydrangeoides 'Moonlight' A
Schizostylis coccinea A
Schoenolirion album L
Sciadopitys verticillata G
Scilla amethystina H
Scilla autumnalis G *
Scilla bifolia H *
Scilla campanulata J *
Scilla hyacinthoides A *
Scilla lilio-hyacinthus J *
Scilla litardierei G *
Scilla mischtschenkoana ! L *
Scilla non-scripta F *
Scilla peruviana *
Scilla pratensis G *
Scilla pyrenaica ! L *
Scilla rosenii H
Scilla scilloides A
Scilla siberica ! L *
Scilla sp. ! L *
Scilla verna ! L *
Scirpus americanus J *
Scleranthus biflorus H 2
Scleranthus uniflorus A 2
Scoliopus bigelovii C
Scopolia stramonifolia F
Scorzonera radiata A
Scorzonera suberosa subsp. cariensis A
Scrophularia chrysantha ?
Scrophularia lanceolata J 7 8
Scrophularia macrantha B 3
Scrophularia marilandica L 3
Scrophularia nodosa A 3 *
Scrophularia pamirica ?
Scrophularia sp. L
Scutellaria albida A
Scutellaria alpina A
Scutellaria alpina 'Arcobaleno' A
Scutellaria alpina 'Moonbeam' B
Scutellaria altissima A
Scutellaria baicalensis A
Scutellaria balearica A
Scutellaria diffusa A
Scutellaria grandiflora A
Scutellaria hastifolia A
Scutellaria incana F
Scutellaria indica var. parvifolia B
Scutellaria laeteviolacea B
Scutellaria lateriflora A
Scutellaria laterifolia A
Scutellaria mongolica A
Scutellaria oreophila ?
Scutellaria pontica A
Scutellaria resinosa A 2
Scutellaria sp. A
Scutellaria velenovskyi A
Scutellaria zhongdianensis A
Secale cereale A
Securigera orientalis ! E *
Securinega suffruticosa A
Sedum acre A
Sedum album A
Sedum all species *
Sedum anacampseros A
Sedum caeruleum A
Sedum cauticola 'Lidakense' A
Sedum hillebrandii A
Sedum Isle of Sakhalin' A 3
Sedum kamtschaticum A
Sedum kamtschaticum var. floriferum A
Sedum kamtschaticum var. floriferum 'Weihenstephaner Gold' A 3
Sedum kamtschaticum var. kamtschaticum 'Variegatum' A
Sedum lanceolatum A
Sedum magellense K 3 *
Sedum middendorffianum A
Sedum nevii A
Sedum pachyclados A
Sedum pallidum var. bithynicum A
Sedum pilosum A 3 4
Sedum pilosum 'Superbum' A 3 4
Sedum pluricaule 'Rose Carpet' A
Sedum populifolium A
Sedum pulchellum A 3
Sedum purdyi A
Sedum pusillum A
Sedum reflexum A 3
Sedum reflexum 'Blue Spruce' A 3
Sedum Rosy Glow' L
Sedum rupestre A 3
Sedum rupestre 'Angelina' A 3
Sedum rupestre subsp. reflexum A 3
Sedum sempervivoides A
Sedum sp. A
Sedum spathulifolium F
Sedum spathulifolium 'Cape Blanco' F *
Sedum spectabile 'Pink Chablis' A 3
Sedum spurium A 3
Sedum telephium A 3
Sedum urvillei A
Sedum x 'Waight Hybrid' ?
Selinum carvifolia E
Selinum tenuifolium D 4
Selinum wallichianum D 4
Semiaquilegi sp. ! J
Semiaquilegia adoxoides ! J
Semiaquilegia ecalcarata A
Semiaquilegia ecalcarata 'Flore Pleno' A
Semiaquilegia simulatrix A 3
Sempervivum 'Appletini' ?
Sempervivum 'Autumn Apple' ?
Sempervivum 'More Honey' ?
Sempervivum 'Silverine' ?
Sempervivum all species *
Sempervivum arachnoideum A
Sempervivum arachnoideum 'Forest Frost' A
Sempervivum arachnoideum x pittonii A
Sempervivum Hayling' ?
Sempervivum heuffelii 'Sundancer' A
Sempervivum hybrid B 3
Sempervivum Jungle Shadows' ?
Sempervivum Majestic' ?
Sempervivum Purple Passion' ?
Sempervivum Silberkarneol' H
Sempervivum sp. B 3
Sempervivum tectorum B 3
Senecio abrotanifolius A
Senecio argunensis A
Senecio argunensis Turcz. A
Senecio aureus A
Senecio cannabifolius A
Senecio cordatus A
Senecio doria A *
Senecio halleri A 3
Senecio incanus A
Senecio incanus subsp. incanus A
Senecio jacquemontianus A
Senecio ligularia A 3
Senecio polyodon A
Senecio polyodon var. subglaber A
Senecio pseudoarnica A
Senecio saxosus A 3
Senecio siegfriedi ? 3
Senecio sp. A *
Senecio werneriifolius A 3
Senna covesii A 6 7
Senna hebecarpa A 6 7
Senna marilandica J 6 7
Senna multiglandulosa A 6
Senna sp. ?
Seriphidium nutans A
Seriphidium vallesiacum A
Serratula coronaria L
Serratula coronata L
Serratula coronata f. alba L
Serratula coronata subsp. insularis L
Serratula seoanei A
Serratula tenuifolia ?
Serratula tinctoria A
Sesamum indicum A
Sesamum trilobum A
Seseli elatum subsp. osseum A
Seseli gummiferum B
Sesleria argentea B
Sesleria autumnalis J
Sesleria caerulea F
Sesleria glauca A
Setaria italica A
Shepherdia argentea J
Shepherdia canadensis H 2
Shortia soldanelloides ! A *
Sibbaldia procumbens A 3 *
Sibbaldia tridentata A
Sibbaldiopsis tridenta A
Sibbaldiopsis tridenta 'Nuuk' A
Sibbaldiopsis tridentata J
Sibiraea altaiensis A
Sibiraea altaiensis var. croatica A
Sibiraea angustata A
Sibiraea laevigata A
Sidalcea candida L
Sidalcea malviflora A
Sidalcea malviflora 'Alba' A
Sidalcea Party Girl' A
Sideritis bicolor J
Sideritis dasygnaphala A
Sideritis hyssopifolia A
Sideritis sp. ?
Sideritis syriaca A 6
Sieversia reptans A
Silaum silaus L
Sildacea sp. A
Silene 'Vesuvius' A
Silene acaulis A
Silene acaulis ex. Iceland A
Silene all species A *
Silene alpestris A
Silene alpestris 'Ice Cups' A
Silene alpina A
Silene alpina 'Alba' A
Silene apetala A
Silene armena A
Silene armeria A 3
Silene armeria 'Electra' A 3
Silene asterias B
Silene atropurpurea A 3 4
Silene baccifer A
Silene baccifera A
Silene baschkirorum A
Silene borderei A
Silene caespitosa A
Silene caroliniana A
Silene caroliniana 'Red Wherry' A
Silene caroliniana ssp. wherryi A
Silene caucasica A
Silene chalcedonica A 3 4
Silene chalcedonica 'Alba' A 3 4
Silene ciliata A
Silene coeli-rosa B
Silene compacta A
Silene coronaria A 3 4
Silene coronaria 'Alba' A 3 4
Silene coronaria 'Hoarfrost' A 3 4
Silene davidii A
Silene delavayi A
Silene dinarica A
Silene dioica D
Silene douglasii A
Silene elisabethae A
Silene fimbriata A
Silene flos- cuculi A 3 4
Silene flos-jovis A
Silene foliosa A
Silene glauca K
Silene glaucifolia A
Silene grayi A
Silene hookeri A
Silene involucrata L
Silene italica A
Silene jenisseensis A
Silene keiskei A
Silene maritima A 4
Silene nutans A
Silene orientalis A
Silene parryi A
Silene pendula 'Compacta' A 2
Silene pendula 'Peach Blossom' A 2
Silene petersonii A
Silene polaris A
Silene purpurata A
Silene pusilla A
Silene regia A
Silene repens A
Silene repens var. angustifolia A
Silene Robin Whitebreast' A 4
Silene ruprechtii ?
Silene samojedorum A 2
Silene saxifraga A
Silene schafta ! A *
Silene schafta 'Splendens' A *
Silene secundiflora K
Silene sibirica A
Silene sieboldii A
Silene sp. A
Silene suecica A
Silene suecica var. oelandica A
Silene tatarica A
Silene tatjanae A
Silene undulata A
Silene uniflora A 4
Silene uniflora 'Compacta' A 4
Silene uniflora 'Ice Cups' A 4
Silene uniflora 'Rosea' A 4
Silene uralensis subsp. apetala A
Silene uralensis subsp. arctica A
Silene virginica G *
Silene viridiflora A
Silene viscaria A 3
Silene viscaria 'Alba' A 3
Silene viscaria 'Feuer' A 3 4
Silene viscaria subsp. atropurpurea A 3 4
Silene viscosa A 2
Silene vulgaris A
Silene wahlbergella A
Silene waldsteinii A
Silene wallichiana A
Silene x arkwrightii A
Silene x arkwrightii 'Vesuvius' A
Silene x haageana L
Silene x robotii A
Silene zawadskii A
Silphium asteriscus J
Silphium integrifolium A
Silphium laciniatum L
Silphium laciniatum L
Silphium perfoliatum A
Silphium terebinthinaceum J
Silphium trifoliatum J
Silybum marianum A
Silybum sp. A
Simethis planifolia A
Sinningia calcaria A
Sinningia sp. A
Sinocalycanthus chinensis A
Sinopodophyllum hexandrum E 8
Sisymbrium luteum A
Sisymbrium sp. A
Sisyrinchium albidum B
Sisyrinchium angustifolium A 3
Sisyrinchium angustifolium f. album A 3
Sisyrinchium bellum A 7 *
Sisyrinchium californicum A
Sisyrinchium douglasii B
Sisyrinchium graminoides A 3
Sisyrinchium idahoense F
Sisyrinchium idahoense var. idahoense F
Sisyrinchium macrocarpum L
Sisyrinchium montanum B
Sisyrinchium mucronatum J
Sisyrinchium Pole Star' J
Sisyrinchium sp. L
Sisyrinchium striatum B
Sisyrinchium tinctorium A
Sium sisarum A
Sium suave K
Smelowskia calycina L
Smilacina purpurea ! L
Smilacina racemosa G *
Smilax herbacea H
Smilax rotundifolia A
Smyrnium perfoliatum E *
Solanum atropurpureum A
Solanum integrifolium A
Solanum lycopersicum A
Solanum lycopersicum 'Orange Hat' A
Solanum melongena 'Turkish Orange' A
Solanum pimpinellifolium 'Yellow Current' A
Solanum sisymbriifolium A
Solanum triangulare ?
Soldanella alpina ! A
Soldanella carpatica ! A 2
Soldanella carpatica x montana ! A 2
Soldanella hungarica ! A
Soldanella minima ! G 3
Soldanella minima 'Alba' ! G 3
Soldanella montana ! A
Soldanella rhodopaea ! G 3
Soldanella sp. ! G
Soldanella villosa ! J
Solenanthus apenninus A *
Solenanthus sp. J
Solenopsis bivonae L
Solenostemon scutellarioides A
Solidago 'Dansolitlem ' K
Solidago 'Little Lemon' A
Solidago alpestris A
Solidago caesia A
Solidago canadensis A 3
Solidago confinis A
Solidago cutleri A
Solidago erecta L
Solidago flexicaulis J
Solidago glomerata A
Solidago hispida A
Solidago hybrid K
Solidago jailarum A
Solidago lapponica A
Solidago leiocarpa A
Solidago multiradiata A
Solidago ohioensis J 3
Solidago ptarmicoides A
Solidago Queenie' J
Solidago riddellii J 3
Solidago rigida A
Solidago sempervirens A
Solidago simplex var. ontarioensis A
Solidago sp. ?
Solidago spathulata A
Solidago speciosa A
Solidago sphacelata 'Golden Fleece' K
Solidago spiraeifolia L
Solidago ulmifolia J 3
Solidago virgaurea A
Solidago virgaurea subsp. jailarum A
Solidago virgaurea subsp. virgaurea A
Sophora japonica ! A 6 7
Sorbaria angustifolia A
Sorbaria tomentosa var. angustifolia A
Sorbus alnifolia G 7
Sorbus all species *
Sorbus americana G 2
Sorbus aria 'Lutescens' G 3
Sorbus aucuparia var. edulis 'Rossica ' *
Sorbus decora ! *
Sorbus intermedia ! *
Sorbus koehneana L
Sorbus koreana ?
Sorbus latifolia ! *
Sorbus pohuashanensis E
Sorbus pseudovilmorinii L 8
Sorbus reducta J
Sorbus sambucifolia ! *
Sorbus sp. L
Sorbus torminalis *
Sorbus yuana ?
Sorghastrum avenaceum G
Sorghastrum nutans J
Sorghastrum nutrans A
Sorghum bicolor A
Sorghum decolor 3 *
Sorghum nigrum A
Sparganium hyperboreum ! A *
Spartium junceum A
Sphaeralcea coccinea F
Sphaeralcea coccinea A 6
Spigelia chiapensis ?
Spigelia marilandica J
Spilanthes acmella A 3
Spilanthes oleracea A 3
Spilanthes sp. ?
Spiraea all species K
Spiraea japonica 'Goldflame' A 3
Spiraea sp. L
Spiraea tomentosa L
Spiraea trifoliata F
Spiraea x arguta 'Bridal Wreath' ?
Spiranthes cernua *
Spodiopogon sibiricus A 3
Sporobolus heterolepis G
Sporobolus sp. A
Sprekelia formosissima A 2
Stachys abchasica A
Stachys albotomentosa K *
Stachys alopecuros A
Stachys betonica A
Stachys bicolor J
Stachys byzantina A
Stachys coccinea A
Stachys cretica A 3 4
Stachys discolor A
Stachys germanica A
Stachys grandiflora A
Stachys lavandulifolia A
Stachys macrantha A
Stachys macrantha 'Superba' A
Stachys minima J
Stachys minor J
Stachys monieri A
Stachys montana subsp. montana J
Stachys officinalis A
Stachys officinalis 'Densiflorus' A
Stachys officinalis 'Hummelo' A
Stachys officinalis 'Pink Cotton Candy' A
Stachys officinalis subsp. officinalis A
Stachys recta A
Stachys spathulata J
Stachys sylvatica A
Stapelia variegata A
Staphylea bumalda ! L
Staphylea pinnata L
Staphylea trifolia L
Staphylea trifoliata L
Stellaria chamaejasme var. chrysantha D
Stellaria graminea A
Stewartia monadelpha ! 5 *
Stewartia pseudocamellia ! 5 *
Stewartia serrata ?
Stigmatocarpum criniflorum A
Stipa arundinacea A 3
Stipa barbata H
Stipa calamagrostis A
Stipa capillata A 3
Stipa caucasica A
Stipa pulcherrima F
Stipa sp. A
Stipa tenuissima F
Stipa zalesskii F
Stokesia laevis A
Stokesia laevis 'Blue Danube' A
Stokesia laevis 'Klaus Jelitto' A
Stokesia laevis 'Peach Melba' A
Stokesia sp. B
Streptopus amplexifolius ! L 8
Streptopus roseus D 2 8
Strobilanthes atropurpureus A
Stylidium graminifolium A 3
Stylophorum diphyllum ! H *
Stylophorum lasiocarpum ! D *
Styphnolobium japonicum A 6
Styrax japonicus D
Styrax japonicus 'Carillon' D
Styrax japonicus 'Pink Chimes' D
Styrax japonicus 'Roseus' D
Styrax obassia C
Succisa inflexa A 3
Succisa pratensis A 3
Succisa pratensis 'Alba' A 3
Succisa pratensis 'Nana' A 3
Succisella inflexa A
Succisella inflexa 'Frosted Pearls' A
Swainsona formosa A 1 6 7 *
Swertia schugnanica L
Symphoricarpos albus C 8
Symphoricarpos Amethyst' C 8
Symphyandra armena A
Symphyandra hoffmannii A
Symphyandra pendula A
Symphyandra sp. A
Symphyandra wanneri A
Symphyandra zangezura A
Symphyotrichum cordifolium J
Symphyotrichum laeve A
Symphyotrichum novae-angliae B
Symphyotrichum novi-belgii J
Symphyotrichum novi-belgii 'Professor Anton Kippenberg' J
Symphyotrichum oblongifolium B
Symphyotrichum oolentangiense A
Symphyotrichum oolentangiensis A
Symphyotrichum puniceum J
Symphyotrichum shortii J
Symphyotrichum subulatum v. squamatum A 3
Symphytum officinale B
Symphytum popovii B
Symphytum tuberosum B
Symphytum x uplandicum 'Axminster Gold' A
Syneilesis aconitifolia A *
Syneilesis intermedia A *
Syneilesis palmata L
Synthyris missurica L
Synurus deltoides L
Syringa komarowii G 8
Syringa reticulata A 3
Syringa reticulata var. amurensis A 3
Syringa reticulata var. mandshurica A 3
Syringa wolfii L 7
Syringa x prestoniae G 3
Syringa yunnanensis J
Taenidia integerrima J
Tagetes 'Cottage Red' A
Tagetes 'Spanish Brocade' A
Tagetes erecta A
Tagetes erecta 'Garland Orange' A
Tagetes erecta 'Giant Orange' A
Tagetes erecta 'Orange Hawaii' A
Tagetes erecta 'Simba' A 2
Tagetes Gem Series A
Tagetes patula A
Tagetes patula 'Colossus' A
Tagetes patula 'Naughty Marietta' A
Tagetes patula 'Queen Sophia' A
Tagetes patula 'Safari Mixture' A
Tagetes patula 'Strawberry Blonde' A 2
Tagetes patula Safari Series A
Tagetes sp. A
Tagetes tenuifolia A
Tagetes tenuifolium A
Talinum calycinum H
Talinum fruticosum A
Talinum lineare ?
Talinum paniculatum A
Talinum paniculatum 'Kingswood Gold' A
Talinum paniculatum 'Limon' A
Talinum rugospermum F
Talinum sediforme F
Talinum spinescens H
Talinum teretifolium A 3
Talinum thompsonii A
Talinum Zoe' A
Tamarix chinensis *
Tamarix pentandra *
Tamarix ramosissima 'Pink Cascade' *
Tanacetum albipannosum K
Tanacetum bipinnatum ! J 3 *
Tanacetum cinerariifolium A 2
Tanacetum coccineum 'James Kelway' A 3
Tanacetum densum subsp. amani A
Tanacetum huronense ! B *
Tanacetum huronense var. terra-novae ! B *
Tanacetum macrophyllum ! A
Tanacetum niveum ! A
Tanacetum niveum 'Jackpot' ! B
Tanacetum parthenium ! A
Tanacetum parthenium 'aureum' ! A
Tanacetum parthenium 'Flore Pleno' A
Tanacetum parthenium 'Selma Star' A
Tanacetum parthenium 'Tetra White Wonder' A 3
Tanacetum parthenium 'White Wonder' ! A
Tanacetum vulgare A
Taraxacum albidum K
Taraxacum carneocoloratum A
Taraxacum faeroense A
Taraxacum magellanicum A
Taraxacum montanum ? 3
Taraxacum pamiricum A
Taraxacum pseudoroseum A
Taraxacum pumilum A
Taxus baccata C 3 4
Taxus brevifolia C
Tecoma sambucifolia A
Tecoma stans A *
Tecoma stans var. sambucifolia A
Telekia sp. A
Telekia speciosa A
Telephium imperati ! A
Telesonix jamesii L 3 *
Tellima grandiflora A 3
Telopea speciosissima A
Telopea truncata A 6
Tephroseris flammea D 2
Tephrosia virginiana A 6 7
Tetraneuris acaulis A
Tetraneuris grandiflora A
Tetraneuris herbacea A
Tetraneuris torreyana A
Teucrium asiaticum K *
Teucrium botrys A
Teucrium canadense B
Teucrium chamaedrys F
Teucrium flavum subsp. glaucum B
Teucrium halacsyanum A
Teucrium hircanicum A
Teucrium montanum F
Teucrium rotundifolium A
Teucrium scorodonia A
Teucrium scorodonia 'Crispum' A
Teucrium subspinosum G
Teucrium webbianum A
Teucrium x lucidrys A
Thalictrum 'Splendide' ! ?
Thalictrum 'Tntnp' ! ?
Thalictrum 'Tntnw' ! ?
Thalictrum acteifolium K
Thalictrum alpinum ! A
Thalictrum aquilegiifolium ! A
Thalictrum aquilegiifolium 'Album' ! A
Thalictrum aquilegiifolium 'Nimbus White' ! L 4
Thalictrum aquilegiifolium 'Purpureum' ! A
Thalictrum aquilegiifolium 'Sparkler' ! A
Thalictrum aquilegiifolium var. intermedium ! A
Thalictrum baicalense ! L
Thalictrum Black Stockings' ! K
Thalictrum chelidonii ! B
Thalictrum dasycarpum ! H
Thalictrum delavayi ! A
Thalictrum delavayi 'Splendide' ! ? 5
Thalictrum diffusiflorum ! L *
Thalictrum dioicum ! K 5
Thalictrum dipterocarpum ! B
Thalictrum filamentosum ! A
Thalictrum flavum ! B
Thalictrum flavum subsp. glaucum ! B
Thalictrum foetidum ! K
Thalictrum glaucum ! A
Thalictrum isopyroides ! A
Thalictrum lucidum ! D
Thalictrum minus ! B
Thalictrum minus 'Adiantifolium' ! B
Thalictrum minus ssp. pubescens ! B
Thalictrum minus var. hypoleucum ! B
Thalictrum most species ! A 5 *
Thalictrum polygamum ! L *
Thalictrum pubescens ! A
Thalictrum Purplelicious' ! K
Thalictrum revolutum ! J
Thalictrum rochebruneanum ! L 4
Thalictrum rochebruneanum 'Lavender Mist' ! L 4
Thalictrum rochebruneanum v. grandisepalum ! L 4
Thalictrum rochebrunianum v. grandisepalum A
Thalictrum simplex subsp. galioides ! A 3
Thalictrum sp. ! B 5
Thalictrum speciosissimum ! F
Thalictrum sphaerostachyum ! A 3
Thalictrum tuberosum ! B
Thalictrum uchiyamae ! G
Thelesperma burridgeanum 'Phillipine' K
Thermopsis caroliniana ! A 1 6 7 *
Thermopsis lanceolata ! A 1 6 7 *
Thermopsis lupinoides A 1 6 7 *
Thermopsis mollis A 1 6 7 *
Thermopsis montana A 1 6 7 *
Thermopsis rhombifolia A
Thermopsis smithiana ! A 1 6 7 *
Thermopsis villosa ! A 1 6 7 *
Thlaspi all species A
Thlaspi alpestre A
Thlaspi alpinum A
Thlaspi arvense A
Thlaspi bellidifolium A
Thlaspi bulbosum A
Thlaspi caerulescens A
Thlaspi crissum A
Thlaspi montanum A
Thlaspi praecox F
Thlaspi rotundifolium A
Thlaspi sp. A
Thlaspi stylosum A
Thlaspi zaffranii A
Thuja koraiensis J
Thuja occidentalis 'Nigra' A 2
Thymophylla tenuiloba K
Thymus all species *
Thymus comosus A
Thymus leucotrichus subsp. neiceffii A
Thymus neiceffii A
Thymus serpyllum A
Thymus serpyllum var. albus A
Thymus tiflisiensis A 3
Thysanotus multiflorus A *
Tiarella Black Snowflake' ! A
Tiarella cordifolia ! A 3 *
Tiarella cordifolia 'Dunvegan' ! A 3 *
Tiarella cordifolia 'Iron Cross' ! A
Tiarella Cygnet' ! A
Tiarella hybrid ! E
Tiarella Iron Butterfly' ! A
Tiarella mix ! E
Tiarella polyphylla ! E
Tiarella sp. ! E
Tiarella Spanish Cross' ! A
Tiarella Spring Symphony' ! A
Tiarella trifoliata var. trifoliata ! K
Tiarella unifoliata ! K
Tiarella wherryi ! A 3
Tibouchina sp. ? 3
Tigridia pavonia K
Tigridia sp. A
Tinantia erecta A 6
Titanopsis calcarea A
Tithonia rotundifolia A 3
Tithonia rotundifolia 'Torch' A 3
Tithonia sp. A
Tofieldia glutinosa B
Tolmiea menziesii B
Tonestus lyallii A
Toona sinensis A 7
Townsendia alpigena A 3
Townsendia condensata A
Townsendia eximia A
Townsendia eximia x grandiflora A
Townsendia exscapa A
Townsendia formosa A
Townsendia grandiflora A
Townsendia hookeri A *
Townsendia incana A
Townsendia minima A
Townsendia montana A 3
Townsendia parryi A
Townsendia rothrockii A
Townsendia sp. A
Trachelium caeruleum A 3
Trachelium jacquinii G
Tradescantia bracteata L
Tradescantia sp. J
Tragopogon crocifolius A
Tragopogon dubius A
Tragopogon sp. A
Tragopogon turkestanicus ! A
Trautvetteria caroliniensis A
Trautvetteria caroliniensis var occidentalis ! A
Trautvetteria palmata ?
Triantha glutinosa G 3
Tricyrtis bakeri A 3
Tricyrtis formosana ! J 3
Tricyrtis formosana 'Autumn Glow' ! J 3
Tricyrtis formosana 'Dark Beauty' ! J 3
Tricyrtis hirta A 3
Tricyrtis hirta 'White Towers' A 3
Tricyrtis hirta 'Alba' A 3
Tricyrtis latifolia A 3
Tricyrtis macranthopsis A
Tricyrtis macropoda D
Tricyrtis puberula A 3
Tricyrtis sp. ! L 3
Tricyrtis White Towers' A 3
Trientalis borealis A
Trifolium incarnatum A
Trifolium repens A 2 6
Trifolium rubens F
Trifolium rubens 'Red Feather' F
Trifolium sp. ?
Trifolium trichocephalum G
Triglochin maritima *
Trillium albidum ! D 2 *
Trillium all species ! L *
Trillium cernuum ! *
Trillium cuneatum ! *
Trillium erectum ! L 4 *
Trillium erectum var. album ! L 4 *
Trillium erectum var. blandum ! L 4 *
Trillium erectum var. declinatum ! L 4 *
Trillium flexipes ! L 4 *
Trillium grandiflorum ! L 4 *
Trillium kurabayashii ! L 4 *
Trillium luteum ! 4 *
Trillium nivale ! L 4 *
Trillium recurvatum ! L *
Trillium rivale H *
Trillium simile ! L *
Trillium undulatum ! L 2 4 *
Trillium vaseyi ! L *
Triosteum aurantiacum L *
Triosteum himalayanum H
Triosteum pinnatifidum H *
Tripetaleia bracteata A
Tripetaleia paniculata A 3
Tripleurospermum caucasicum K
Tripolium pannonicum subsp. tripolium A 3
Tripora divaricata L
Tripterygium regelii A
Tripterygium wilfordii A
Triteleia bridgesii B
Triteleia grandiflora K
Triteleia hyacinthina L
Triteleia ixioides ! A
Triteleia laxa A
Triteleia laxa Koningin B
Triticum spelta A
Tritonia disticha ssp. rubrolucens A
Tritonia sp. ! A
Trollius acaulis G
Trollius altaicus ! E
Trollius altissimus G
Trollius chinensis ! L
Trollius chinensis 'Golden Queen' ! L
Trollius dschungaricus G
Trollius europaeus E
Trollius europaeus 'Golden Globe' E
Trollius europaeus 'Superbus' E
Trollius hondoensis G
Trollius hybrid G
Trollius ircuticus L
Trollius laxus ! L
Trollius laxus 'Albiflorus' ! L
Trollius laxus var. albiflorus ! L
Trollius ledebourii ! L
Trollius pumilus A
Trollius sp. G
Trollius x cultorum H
Trollius x cultorum 'Cheddar' H
Trollius x cultorum 'Golden Queen' ! L
Trollius x cultorum 'Lemon Queen' ! L
Trollius x cultorum 'New Moon' H
Trollius x cultorum 'Orange Queen' ! L
Tropaeolum minus 'Tip Top Apricot' A
Tropaeolum incisum A
Tropaeolum majus A
Tropaeolum peregrinum A
Tropaeolum sp. A
Tropaeolum speciosum A
Tuberaria guttata A
Tulbaghia fragrans A
Tulbaghia fragrans 'Alba' A
Tulbaghia natalensis A
Tulbaghia simmleri A
Tulbaghia sp. A
Tulbaghia violacea A
Tulipa Addis' L *
Tulipa all species L *
Tulipa Ancilla' L *
Tulipa Batalinii Group L *
Tulipa biebersteiniana L *
Tulipa biflora L *
Tulipa clusiana L *
Tulipa clusiana 'Cynthia ' C *
Tulipa clusiana 'Lady Jane' C *
Tulipa clusiana var. chrysantha C *
Tulipa dasystemon L *
Tulipa Fashion' L *
Tulipa Giuseppe Verdi' L *
Tulipa greigii L *
Tulipa Heart's Delight' L *
Tulipa humilis var. pulchella L *
Tulipa kaufmanniana D *
Tulipa kolpakowskiana L *
Tulipa Little Beauty' L *
Tulipa neustruevae L *
Tulipa Plaisir' L *
Tulipa polychroma L *
Tulipa pulchella L *
Tulipa saxatilis L *
Tulipa saxatilis Bakeri Group L *
Tulipa sp. L *
Tulipa sprengeri L *
Tulipa Sweet Lady' L *
Tulipa sylvestris L *
Tulipa tarda L *
Tulipa turkestanica C *
Tulipa urumiensis L *
Tunica saxifraga A
Turritis brassica ?
Turritis glabra A
Tweedia coerulea A
Typha minima A *
Umbilicus platyphyllus A
Umbilicus rupestris A
Unknown sp. ? 3
Utricularia cornuta ?
Uvularia grandiflora ! L *
Uvularia perfoliata x grandiflora ! L *
Vaccinium macrocarpon E
Vaccinium membranaceum A
Vaccinium sp. G
Vaccinium uliginosum subsp. microphyllum G 3 4
Vaccinium vitis-idaea A 3
Valeriana gibbosa ?
Valeriana montana J
Valeriana officinalis G 3
Valeriana pyrenaica A
Valeriana rubra A
Vella spinosa A
Veltheimia bracteata A 2
Veltheimia sp. A 2
Venidium fastuosum A
Venidium sp. A
Venidium Zulu Prince' A
Veratrum album 7 *
Veratrum album subsp. album 7 *
Veratrum nigrum A 7 *
Veratrum species 7 *
Veratrum viride ! 7 *
Verbascum Arctic Summer' A
Verbascum atroviolaceum A
Verbascum bakerianum A
Verbascum barnadesii J
Verbascum blattaria A 3
Verbascum blattaria f. albiflorum A 3
Verbascum blattaria var. albiflora A 3
Verbascum bombyciferum A
Verbascum bombyciferum 'Polarsommer' A
Verbascum bugulifolium A
Verbascum chaixii A 3
Verbascum chaixii 'Wedding Candles' A 3
Verbascum chaixii 'Album' A 3
Verbascum chaixii 'Sixteen Candles' A 3
Verbascum chaixii f. album 'Wedding Candles' A 3
Verbascum Cotswold Cream' A
Verbascum Cotswold Gem' A 3
Verbascum Cotswold Group A 3
Verbascum creticum A 3
Verbascum densiflorum A
Verbascum dumulosum A
Verbascum hybrid A
Verbascum lychnitis A 3
Verbascum lydium A
Verbascum nigrum A 3
Verbascum nigrum var. album A 3
Verbascum olympicum A
Verbascum olympicum A
Verbascum phoeniceum A
Verbascum Primrose Cottage' A
Verbascum pulverulentum A
Verbascum pyramidatum A 3
Verbascum Raspberry Ripple' A 3
Verbascum roripifolium A 3
Verbascum sp. A 3
Verbascum thapsus A
Verbascum wiedemannianum A
Verbascum x hybridum 'Banana Custard' A
Verbascum x hybridum 'Snow Maiden' A 3
Verbascum x splendidum A 3
Verbena bonariensis A
Verbena hastata J 3
Verbena hastata 'Alba' J 3
Verbena officinalis L
Verbena rigida J
Verbena simplex L
Verbena stricta J
Verbesina alternifolia J
Verbesina encelioides A 3
Verbesina helianthoides J
Vernonia acaulis G
Vernonia altissima A 3 4 *
Vernonia arkansana G
Vernonia arkansana 'Mammuth' G
Vernonia baldwinii G
Vernonia crinita G
Vernonia fasciculata G
Vernonia gigantea G
Vernonia gigantea 'Jonesboro Giant' G
Vernonia glauca G
Vernonia lettermanii 'Iron Butterfly' L
Vernonia lindheimeri G *
Vernonia noveboracensis G 2
Vernonia noveboracensis f. alba G 2
Vernonia sp. A
Veronica 'Sunny Border Blue' A 3
Veronica allionii A
Veronica alpina J
Veronica aphylla D
Veronica armena A 3
Veronica austriaca A 3
Veronica austriaca subsp. teucrium A 3
Veronica austriaca subsp. teucrium 'Royal Blue' A 3
Veronica bellidioides A
Veronica flexuosa ?
Veronica fruticans G 2
Veronica fruticosa A 3
Veronica fruticulosa A
Veronica gentianoides A 3
Veronica grandiflora A 3
Veronica hybrid A
Veronica incana A
Veronica kellereri A
Veronica longifolia A 3
Veronica longifolia 'First Glory' A 3
Veronica missurica ssp. stellata L
Veronica nipponica A
Veronica officinalis B 3
Veronica peduncularis L
Veronica prostrata B 3
Veronica prostrata 'Verbrig' B 3
Veronica sachalinensis A
Veronica saturejoides B 3
Veronica schmidtiana B 3
Veronica schmidtiana 'Nana' B 3
Veronica sibirica A
Veronica sp. L
Veronica spicata A
Veronica spicata 'Giles Van Hees' A
Veronica spicata 'Nana Blauteppich' A
Veronica spicata 'Red Fox' A
Veronica spicata 'Sightseeing' A
Veronica spicata subsp. incana A
Veronica spicata subsp. incana 'Nana' A
Veronica subsessilis A
Veronica tauricola A
Veronica Very Van Gogh' A 3
Veronicastrum album B
Veronicastrum satureioides A
Veronicastrum sibiricum K 3
Veronicastrum sp. J 3
Veronicastrum virginicum J 3 6
Veronicastrum virginicum 'Album' J 3 6
Veronicastrum virginicum 'Lavendelturm' J 3 6
Veronicastrum virginicum var. incarnatum J 3 6
Vestia foetida A
Viburnum alnifolium L
Viburnum carlesii G 8
Viburnum carlesii 'Compactum' G 8
Viburnum cassinoides D 8
Viburnum cassinoides 'Brandywine' D 8
Viburnum dentatum 'Blue Muffin' L 8
Viburnum farreri L 8
Viburnum fragrans L 8
Viburnum lantanoides D 8
Viburnum lentago L 8
Viburnum nudum var. cassinoides D 8
Viburnum opulus var. americana D 8 *
Viburnum plicatum f. tomentosum C
Viburnum plicatum f. tomentosum 'Molly Schroeder' D 8
Viburnum sargentii D
Viburnum sp. L 8
Viburnum trilobum C
Viburnum veitchii L 8
Viburnum x carlcephalum L 8
Vicia cassia A 7
Vicia cracca A 7
Vicia faba A 7
Vicia sepium A 7
Vicia sp. A 7
Vicia sylvatica A 7
Vicia sylvestris A
Vincetoxicum nigrum A 4
Viola adunca ! G
Viola adunca v. bellidifolia ! G
Viola aetolica ! F
Viola altaica ! A
Viola Antique Lace' ! ?
Viola bertolonii ! G
Viola betonicifolia ! A 2
Viola biflora ! K
Viola calcarata ! A
Viola canadensis ! L
Viola chaerophylloides ! L
Viola cornuta ! A 3
Viola cornuta 'Alba Minor' ! A 2
Viola cornuta 'Baby Franjo' ! A 2
Viola cornuta hybrid ! A 3
Viola corsica ! A
Viola crassa ! J
Viola dacica ! A
Viola Dancing Geisha' ! ? *
Viola dubyana ! J
Viola elatior ! B
Viola fimbriatula ! D 3 4
Viola hondoensis ! J
Viola hybrid ! A 3
Viola jooi ! G
Viola kelleri ! J
Viola labradorica ! C 3
Viola lanceolata ! F
Viola lancifolia ! L
Viola mandshurica ! F
Viola montana ! ?
Viola most species ! *
Viola nephrophylla ! L
Viola Nigra' ! A 2
Viola odorata ! A 4
Viola odorata 'Sulphurea' ! A 4
Viola palmata ! D *
Viola pedata ! E
Viola pedatifida ! D
Viola pensylvanica ! A
Viola pinnata ! L
Viola pubescens ! G
Viola pyrenaica ! J
Viola Rodney Davey' ! F
Viola somchetica ! J
Viola sororia ! J *
Viola sororia 'Freckles' ! D *
Viola sp. ! J
Viola subsinuata A 2
Viola tricolor 'Bowles' Black' ! A 3 *
Viola tricolor subsp. curtisii ! A 3
Viola verecunda var. yakusimana ! J
Viola x wittrockiana A
Viscaria vulgaris A 3
Visnaga adunca A
Visnaga daucoides 'Green Mist' A
Vitaliana primuliflora E
Vitex agnus-castus A 3 7
Wahlenbergia albomarginata B
Wahlenbergia congesta A 3
Wahlenbergia saxicola A 3
Weigela Bristol Ruby' L
Weigela middendorfiana A
Weigela praecox L
Wisteria Boskoop' A 6 7
Wisteria frutescens v. macrostachya A 6 7
Wisteria frutescens v. macrostachya 'Aunt Dee' A 6 7
Wisteria frutescens 'Aunt Dee' ! A 7
Wisteria frutescens 'Blue Moon' A 6 7
Wisteria frutescens subsp. macrostachya 'Aunt Dee'' A 6 7
Wisteria frutescens subsp. macrostachya 'Blue Moon' A 6 7
Wisteria frutescens subsp. macrostachya 'Blue Moon' A 6 7
Wisteria grandiflora A 6 7
Wisteria macrostachya 'Aunt Dee' A 6 7
Wisteria macrostachya 'Blue Moon' A 6 7
Wisteria sinensis A 6 7
Wisteria sinensis 'Aunt Dee' A 6 7
Wisteria sinensis 'Prolific' A 6 7
Wulfenia baldaccii A
Wulfenia blechicii J
Wulfenia blechicii subsp. rohlenae J
Wulfenia carinthiaca A 3
Wulfenia sp. L
Wulfenia x suendermannii A 3
Xanthisma coloradoense A
Xanthoceras sorbifolium A 2
Xanthorhiza simplicissima ! J
Xerochrysum bracteatum A
Xerophyllum tenax E
xPardancanda norrisii 'Sangria' A
xPardancanda sp. A 3
Xylanthemum tianschanicum A
Yucca brevifolia A *
Yucca filamentosa A
Yucca filamentosa 'Ivory Tower' A
Yucca filamentosa 'Variegata' A
Yucca flaccida 'Golden Sword' A 7
Yucca flaccida 'Wilder's Wonderful' A 7
Yucca glauca A
Yucca sp. A
Zabelia tyaihyoni ? L
Zantedeschia aethiopica A 2 8 *
Zantedeschia aethiopica 'Green Goddess' A 2 8 *
Zantedeschia elliottiana A 4
Zantedeschia sp. A 2 8 *
Zauschneria californica A
Zauschneria californica subsp. garrettii A
Zauschneria californica subsp. latifolia A
Zauschneria garrettii A 3
Zea mays A
Zea mays var. japonica A
Zelkova serrata 'Green Mansions' J 7 *
Zephyranthes atamasco ! A
Zephyranthes candida ! A
Zephyranthes chlorosolen ! A
Zephyranthes citrina ! A
Zephyranthes drummondii ! A
Zephyranthes grandiflora ! A
Zephyranthes hybrid ! A
Zephyranthes La Bufa Rosa Group ! A
Zephyranthes macrosiphon ! A
Zephyranthes minuta A
Zephyranthes rosea ! A
Zephyranthes sp. ! A
Zephyranthes sulphurea ! A
Zigadenus elegans J
Zigadenus fremontii L
Zigadenus sp. ?
Zinnia 'Berry Tart' A
Zinnia 'Peppermint Stick' A
Zinnia elegans A
Zinnia elegans 'Benary's Giant' A
Zinnia elegans 'California Giants' A
Zinnia elegans 'Envy' A
Zinnia elegans Benary's Giant Series A
Zinnia grandiflora F
Zinnia hybrid A
Zinnia Paintbrush' A
Zinnia peruviana A
Zinnia peruviana 'Red Spider' A
Zinnia sp. A
Zizia aptera A 3
Zizia aurea J
Ziziphora clinopodioides A
Plant Name Full
Info		 Viable Germ
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Info