Distribution: Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; Alaska to California, east in British Columbia to the Selkirk Mountains.

Habitat: Stream banks, wet meadows and other moist places, from low to middle elevations in the mountains.

Flowers: July-September

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, beetles

Stout, leafy-stemmed perennial from an erect, simple crown, often 1 m. or more tall, the stem glaucous.

Leaves ternately-pinnately twice compound, bending downward, the base of the petiole sheathing; leaflets ovate to lanceolate, serrate, 4-10 cm. long and 1.5-5 cm. wide, glabrous except for the veins beneath.

Compound umbels several, rays 22-45, unequal, up to 7 cm. long; involucre wanting; involucels of well-developed, narrow bractlets; calyx obsolete; petals 5, glabrous, white or pinkish.

Ovary inferior, 2-celled, glabrous, the stylopodium broadly conic; fruit broadly sub-orbicular, 3-4 mm. long and wide, with narrowly-winged dorsal ribs and lateral wings nearly as wide as the body.