Distribution: British Columbia south to California and eastward throughout the intermountain west; sporadically in central and eastern North America.
Habitat: Disturbed areas, riparian zones, and forest edges at low elevations.
Conservation Status: Not of concern
Strong, more or less evergreen perennial, the stems up to 10 m. long, ascending to sprawling, armed with strong, flattened prickles.
Leaves mostly 5-foliate, the leaflets broadly oblong to ovate, short acuminate, 6-12 cm. long, sharply serrate, bright green and glabrous above, grayish-woolly beneath.
Inflorescence a flat-topped panicle; calyx woolly, the 5 segments reflexed, lanceolate, 8-12 mm. long; petals 5, white to reddish tinged, oval-obovate, 10-15 mm. long; stamens 100 or more; pistils many, the style slender, glabrous.
Drupelets coherent, and with the fleshy receptacle forming a nearly globose blackberry 1.5 cm. thick.