Small tree, often with several trunks and many branches, or a thicket-forming shrub; sometimes spiny. Flowers 0.8-1 in (2-2.5 cm) wide, with five rounded white or pink petals. Leaves 1.5-3.5 in (4-9 cm) long, 0.8-1.5 in (2-4 cm) wide. Height: 30 ft (9 m). Diameter: 1 ft (0.3 m).
Along streams and valleys; also on low slopes and in coniferous forests.
Southern Alaska south near Pacific Coast to northwestern California; to 1,000 ft (305 m).