Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations. (3 photos)
John and Jacq's Garden - Informational page provided by home gardeners in Malaysia with details on culture and propagation. (zone 4-11) (10 photos)
Missouri Botanical Garden - Plantfinder page for one of the plants growing at the garden, with usually one or more photos, horticultural information, and noteworthy characteristics. (zone 4-10) (5 photos). Also pages for 'Pekinensis Rubra' and 'Perry's Giant Sunburst'.