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 5-8) (7 photos). Also pages for 'Krauter Vesuvius', 'Newport', and 'Thundercloud'.
Trees and Shrubs Online - Reference page curated by the International Dendrology Society with descriptive characteristics and horticultural notes. (6 photos)
Virginia Tech Dendrology - Factsheet with botanical characteristics and photos of various features. (zone 4-8) (5 photos)
(1 photo)