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Perennial herb from a short rhizome or woody stem-base; stems erect, solitary, branched above, glabrous, 30-70 cm tall.
Basal leaves elliptic to oblanceolate, stalked, 2-15 cm long including the stalk, 0.6-3.4 cm wide, toothed, glabrous; stem leaves similar but larger, 2-21 cm long, 0.7-4.2 cm wide, egg-shaped to lanceolate, toothed, progressively reduced upwards, becoming unstalked.
Heads with ray and disk flowers, few to many on glabrous to sparsely long-hairy stalks in an open flat-topped inflorescence; involucres 7-12 mm tall; involucral bracts lanceolate to more oblong, purplish or black-hairy tipped, otherwise glabrous or rarely with inconspicuous unstalked glands at the tip, margins translucent; bracteoles few, conspicuous, tipped with purplish or black hairs; ray flowers yellow, 6-14 mm long; disk flowers yellow.
Achenes oblong, nerved, glabrous; pappus of white hairlike bristles.
Source: The Illustrated Flora of British Columbia