Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (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 3-7) (14 photos)
NARGS Image Gallery - Photograph(s) contributed by North American Rock Garden Society members. (4 photos)
(2 photos)