Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments.
Denver Botanic Gardens - Description, native range, and cultural requirements. (additional pages for other varieties) (8 photos). Also a page for another instance.
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) (3 photos). Also a page for 'Alba'.
NARGS Image Gallery - Photograph(s) contributed by North American Rock Garden Society members. (1 photo)