Largest horticultural society in Scotland and considered by many to be the friendliest and most accessible in the World. Outstanding new website. Also see The International Rock Gardener, an on-line monthly magazine posted on their previous site.
A project of Royal Botanic Gardens, Kew and Missouri Botanical Garden combines data sets held by many collaborators. "One-stop shopping" to confirm spelling and the current and correct naming of species. A great time saver!