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General:
Perennial herb from a creeping rhizome; stems erect, branched in the inflorescence, essentially glabrous, 0.3-1.0 m tall.
Leaves:
Basal leaves lacking; stem leaves alternate, numerous, unstalked, lance-linear, 7-11 times as long as wide, up to 13 cm long and 12 mm wide, 3- to 5-nerved, glabrous or hairy, never glaucous; lower stem leaves soon deciduous.
Flowers:
Heads with ray and disk flowers in a compact, flat-topped inflorescence; involucres 3-5 mm tall; involucral bracts obtuse to abruptly sharp-pointed, yellow and often green-tipped; ray flowers yellow; disk flowers yellow.
Fruits:
Achenes angled or more or less cylindric, several-nerved, hairy; pappus of white, hairlike bristles.
Source: The Illustrated Flora of British Columbia
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