Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 6-8) (4 photos)
Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 5) (3 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 4-8) (1 photo)