Hebe Society
International society based in Britain promoting the cultivation and conservation of hebes and other New Zealand native plants. Includes plant profiles and photos, FAQs, and links.
New Ornamentals Society
Devoted to the study of new and rare ornamental landscape plants. Includes an online source guide and plant encyclopedia.
Scottish National Sweet Pea Rose & Carnation S
Society home page with Sweet Pea & Rose trial results, flower show venue & reports.
The Geraniaceae Group
An international horticultural club interested in the species of all the genera of the Geraniaceae Family.