Distribution: Occurring east of the Cascades crest in Washington in the far eastern part of the state; Washington to northeast Oregon east to Idaho and western Montana.
Habitat: Shady woods at moderate elevations in the mountains.
Conservation Status: Not of concern
Perennial with deep-seated roots from which arise scaly, dark-brown rhizomes, the flowering stems 1.5-3.5 dm. tall.
Basal leaves single, trifoliate, long-petiolate, the leaflets coarsely bi-serrate, the lateral pair often bi-lobed over half their length; the flowering stem naked except for a whorl of 3 leaves near the top, these similar to the basal leaves but somewhat larger and appressed short-hairy.
Flowers single; sepals 5-7, white or pinkish, 12-16 mm. long; petals none; stamens 35-55; pistils numerous.
Achenes elliptic, 3 mm. long; style 0.5 mm. long, glabrous.