Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 4-8) (4 photos)
Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations.
Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (4 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 3-8) (2 photos)
Missouri Plants - Description and photographs of botanical features, with notes about habitat and native status. (5 photos)
(1 photo)