* 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
* History of Rhododendrons* Historical Survey of Rhododendron Collecting - With Emphasis on its Close Associations with Horticulture* Rhododendron in botanical garden Pruhonice-Czech republic=== Databases ===* USDA: Rhododendron* ITIS: Rhododendron=== Flora ===* Flora of China: "Rhododendron"* Flora of North America: "Rhododendron"===Rhododendron societies===* American Rhododendron Society** Journal of the American Rhododendron Society (JARS) 1947-1996* 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* Fraser South Rhododendron Society=== Botanical gardens ===* Royal Botanic Garden Edinburgh: Rhododendron Publications