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General:
Biennial or short-lived perennial herb from a poorly-developed to evident taproot; stems erect, solitary or several, branched above, sparsely to densely white woolly-hairy, 0.2-1 m tall.
Leaves:
Basal leaves oblanceolate, stalked, 4-20 cm long including the stalk, 2-6 cm wide, mostly 2-3 times pinnately cut, thinly woolly-hairy when young but usually glabrous by flowering time; stem leaves similar, progressively reduced upwards, becoming unstalked.
Flowers:
Heads with ray and disk flowers, several to numerous in clusters; involucres 2-5 mm tall; involucral bracts oblanceolate, with long-pointed, usually black tips, hairless to sparsely woolly-hairy, margins translucent; bracteoles few, black-tipped; ray flowers yellow, 4-10 mm long; disk flowers yellow.
Fruits:
Achenes oblong, nerved, those of the disk flowers minutely coarse-hairy, those of the ray flowers glabrous; pappus of white hairlike bristles.
Source: The Illustrated Flora of British Columbia
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