Distribution: Occurring east of the Cascades crest in northeastern Washington; Alaska to northern Washington and eastern Oregon, east to central Idaho and northwest Montana; circumboreal.

Habitat: Moist places in the mountains, often in wet meadows.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, flies, sawflies

Fibrous-rooted perennial from a stout, branched rhizome, the unbranched stem glabrous, 1-4 dm. tall; some plants have perfect flowers, others have only pistillate flowers.

Basal leaves well-developed, petiolate, the blade up to 8 cm. long and 3 cm. wide, mostly undivided; cauline leaves opposite, 2-4 pairs, sub-sessile, pinnatifid, the terminal lobe ovate-oblong or narrower, up to 5 cm. long and 2.5 cm. wide, the 1-7 pairs of lateral lobes smaller, under 1 cm. wide.

Inflorescence compact, 1.5-3 cm. wide, elongating in fruit; calyx enlarging and spreading, with 9-15 plumose, bristle-like segments; corolla united, white, 2-4 mm. long, the 5 lobes about equal to the tube; stamens 3, well exerted; ovary inferior, with two of the three cells vestigial.

Inflorescence compact, 1.5-3 cm. wide, elongating in fruit; calyx enlarging and spreading, with 9-15 plumose, bristle-like segments; corolla united, white, 2-4 mm. long, the 5 lobes about equal to the tube; stamens 3, well exerted; ovary inferior, with two of the three cells vestigial.