Native to (or naturalized in) Oregon:
- Deciduous shrub or small tree, 10-15 ft (3-4.5 m) high, upright, slender branches. Leaves alternate, simple, oblong to obovate, 3-8 cm long, about half as wide, acute and terminated in an abrupt tip, entire, or serrate on vigorous shoots, medium green above, whitish below. Flowers perfect, white, about 4 cm wide, 5-petaled, 3 stamens at the base of each petal; 6-10 flowers per cluster (raceme); flower buds roundish, "pearl-like". Fruit 5-valved, dehiscent, about 8 mm wide, yellow to brown.
- Hardy to USDA Zone 4 Native to northern China.