E-Flora BC: Electronic Atlas of the Flora of British Columbia

General:
Malodorous perennial herb from a long, stout taproot below a branching stem-base which is often covered by the dead leaves of the previous year; stems several, glabrous, 15-50 cm tall.

Leaves:
Mostly basal, short rough-hairy, very finely dissected, with numerous, very narrow, often subterete ultimate segments that lie in numerous planes to form a thick mat.

Flowers:
Inflorescence of compound umbels; flowers yellow; spokes of the umbel elongate unequally, 3.5-10 cm long; involucels well-developed.

Fruits:
Elliptic, 8-15 mm long, glabrous, lateral wings 1/3 - 1/2 as wide as the body.