Saskatoon Serviceberry (Amelanchier alnifolia) is an attractive, deciduous, suckering shrub with four seasons of interest. In the spring, beautiful clusters of white, fragrant flowers bloom, and are replaced by blue or purple berries in June. These berries are loved by many species of birds, and can be used in jam and jelly making. In the fall, the gree foliage turns shades of red and orange. An excellent addition to garden beds as a specimen plant, foundation plantings, woodland or shade gardens, or food forest/permaculture plantings. Also makes a good privacy screen or hedge. Saskatoon Serviceberry is somewhat tolerant of urban pollution. 
Photo Credit: Thayne Tuason