* History of Rhododendrons* Historical Survey of Rhododendron Collecting - With Emphasis on its Close Associations with Horticulture* Rhododendron in botanical garden Pruhonice-Czech republic=== Rhododendron societies ===* American Rhododendron Society* The Rhododendron, Camellia & Magnolia Group of the Royal Horticultural Society* Rhododendron Species Foundation and Botanical Garden* Société Finlandaise du Rhododendron* Australian Rhododendron Society* German Rhododendron Society* New Zealand Rhododendron Association* Danish Rhododendron Society