Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; Washington to California.
Habitat: Dry to moist woodlands at low to middle elevations.
Conservation Status: Not of concern
Herbaceous perennial from slender, horizontal rhizomes, the flowering stems 1-3 dm. tall, glabrous to stiff-hairy.
Basal leaves usually solitary, the blade tri-foliate, the leaflets short-petiolate, ovate, with coarse, rounded teeth, usually glabrous; the 3 involucral leaves simple, up to 8 cm. long, very similar to the leaflets of the basal leaves.
Flowers solitary; sepals usually 5, white, ovate to oblanceolate, 1.5-2.5 cm. long, glabrous; petals none; stamens and pistils numerous; style shorter than the achene.
Achene swollen, ovate, 2.5-4 mm. long.