Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, disjunct in northern Idaho.
Habitat: Lowland moist woods and swamps to middle elevations in the mountains.
Conservation Status: Not of concern
Rhizomatous, thicket-forming, woody perennial 1-3 m. tall, the stems bristly at least below, the bark brown and shredding.
Leaves trifoliate, the leaflets ovate, nearly glabrous, doubly serrate, the terminal one 4-9 cm. long, the others smaller, often lobed.
Flowers 1-2 on short leafy branches; calyx pubescent, the 5 lobes ovate-lanceolate, pointed, spreading, 9-15 mm. long; petals 5, purplish-red, obovate-elliptic, half again as long as the sepals; stamens 75-100; pistils numerous.
Drupelets yellow to reddish, weakly coherent, coming free from the receptacle.