Distribution: Known from Yakima County in Washington; also known from the Columbia River Gorge area in Oregon, and other scattered locations in southwestern North America.
Habitat: Disturbed open areas at low elevations.
Conservation Status: Not of concern
Stems viny, typically climbing, 2-8 m long.
Blade pinnately 5 or 7 times foliolate, margins entire or crenate-serrate, however, toothing may be coarsely few; proximal leaflets occasionally 3 times foliolate; leaflets lanceolate to elliptic/ovate, 2 or 3 lobed proximally, 1-5.5 x 0.5-3.5 cm long.
Flowers bisexual; sepals wide-spreading and recurved, greenish-yellow, ovate-lanceolate to elliptic, margins densely pubescent: abaxially and adaxially pubescent or abaxially glabrous; stamens number from 20-40, staminodes absent. pistils number 75-150; Inflorescences axillary and sometimes terminal, 3 to many - flowered cymes or solitary.
Achenes turgid, not conspicuously rimmed and pilose; beaks 2-5 cm long.