Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 6-9) (4 photos)
Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (5 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 6-7) (3 photos). Also a page for 'Hazel Hamilton'.
(4 photos)