Distribution: Mainly west of the Cascades in Washington; British Columbia south to California, east to Nevada.
Habitat: Open woods at low elevations.
Conservation Status: Not of concern
Glabrous to pubescent shrubs or climbing vines 1-15 m. tall.
Leaves trifoliate; leaflets ovate to obovate, sinuate to deeply lobed, rounded to acute, 3-7 cm. long.
Inflorescence of loose, axillary panicles; flowers mostly imperfect, dioecious, 1-2 mm. long; calyx 5-parted, pubescent to glabrous, about half the length of the petals; petals 5, spreading; staminate flowers with 5 exerted stamens, the filaments attached to the rim of a fleshy, flat disk; ovary superior, style 1, stigmas 3.
Fruit drupe-like, globose, glabrous, about 5 mm. long.