Amelanchier alnifolia, known as the the Saskatoon, Pacific Service Berry or western Service Berry is a shrub with edible berry-like fruit, native to North America from Alaska across most of Western Canada. It grows from sea level in the north of the range, up to 2,600 m (8,530 ft) elevation in California and 3,400 m (11,200 ft) in the Rocky Mountains and is a common shrub in the forest under story. It is a deciduous shrub or small tree that can grow to 1–8 m (3–26 ft) (rarely to 10 m or 33 ft) in height. Its growth form spans from suckering and forming colonies to clumped. The leaves are oval to nearly circular, 2–5 cm (0.79–1.97 in) long and 1–4.5 cm (0.4–1.8 in) broad, on a 0.5–2 cm (0.2–0.8 in) leaf stem, margins toothed mostly above the middle. As with all species in the genus Amelanchier, the flowers are white, with five quite separate petals.