Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (49 photos)
Las Pilitas Nursery - Catalog page about this California native, with description and horticultural basics. (zone 2-7) (1 photo)
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 4-7) (4 photos). Also pages for 'Cesarini Blue' and 'Vanderwolf's Pyramid'.
NARGS Image Gallery - Photograph(s) contributed by North American Rock Garden Society members. (1 photo)