Distribution: Both sides of the Cascades, Alaska to California, east to Utah and Wyoming, and across the northern states to Michigan
Habitat: Moist to dry areas, lowlands to moderate elevations
Flowers: May - June
Conservation Status: Not of concern
Large shrubs or small trees, 1-6 m. tall, armed with stout, straight thorns 1-2 cm. long.
Leaf blades obovate, tapered to the petiole, 3-6 cm. long and nearly as broad, weakly lobed, pubescent to glabrous on both surfaces.
Flowers few in the leaf axils or terminal; calyx bell-shaped, the 5 lobes triangular, entire, reflexed, 1.5-2.5 mm. long; petals 5, white, orbicular, 5-7 mm. long; stamens 10, styles 5.
Berry blackish, glabrous, about 1 cm. long.