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) (6 photos). Also a page for 'Arendsii'.
Paghat's Garden - Illustrated articles by a gardener in the Pacific Northwest, with background and personal observations. (4 photos). Also a page for 'Arendsii'.