Dr. Pavel Slaby's Rockgarden Plant Database
Synonyms, short description, natural habitat, size, color, bloom, type, cultivation and propagation of over 20,000 species.
Taxonomic data and nomenclature, scientific and common names, classification, distribution, references, and economic impacts.
International Plant Names Index
Database of the names and basic bibliographical details of seed plants, ferns and lycophytes.
MBOT's Plantfinder is useful for confirming the correct species name when you know a common name for a plant.
Royal Horticultural Society Database
This is the primary reference used by the ORG&HPS Seedex in confirming cultivar names.
This is the primary reference used by the ORG&HPS Seedex to confirm the spelling and the current and correct naming of species.
