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

General:
Perennial aromatic herb from a stout rhizome; stems erect, simple or branched above, glabrous or nearly so below the inflorescence, hairy above, 0.5-1.5 m tall.

Leaves:
Stem leaves cleft nearly to the midrib in ascending, abruptly sharp-pointed, unequal segments which are again toothed or more deeply cleft, and usually with 1-2 pairs of stipule-like lobes at the base, sometimes becoming entire above, green and glabrous above or nearly so, densely white-woolly below, mostly 5-10 cm long, 3-7 cm wide.

Flowers:
Heads disciform, numerous in a generally ample, leafy, branched inflorescence; involucres bell-shaped, 3.5-4.5 mm tall; involucral bracts broadly lanceolate, densely woolly; receptacles glabrous; female flowers 6-12; disk flowers 8-18.

Fruits:
Achenes glabrous.