Distribution: Occurring chiefly west of the Cascades crest in Washington, less common in southeast corner of the State; Alaska south to California, in other scattered locations in western North America, and widely distributed in eastern North America.
Habitat: Forest edges, clearings, fields, wastelots, and other disturbed areas at low elevations. Seeds readily dispersed by birds.
Origin: Introduced from Eurasia and North Africa
Conservation Status: Not of concern
Glabrous, thorny, deciduous small shrub or tree, 2-10 m. tall. Thorns continue to grow as short thorn-tipped branches with leaves budding from the sides of the thorns.
Leaves ovate, deeply 3-lobed more than halfway to the midrib, 2.5-5 cm. long and nearly as broad.
Inflorescence a broad, dense, flat-topped cluster; flowers 8-15 mm. wide, the petals white; style 1.
Fruit a crimson berry, globose, 7-10 mm. in diameter, with single large seed.