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Annual or biennial herb from a taproot; stems erect, usually solitary, short-hairy below, branched, 30-110 cm tall.
Basal leaves oblanceolate, up to 20 cm long and 4 cm wide, toothed or pinnately cut with the lobes pointing backwards, obtuse, short-stalked, short-hairy; middle stem leaves similar to the basal ones or sometimes long-stalked, unstalked and reduced upwards, lanceolate, usually with long-pointed tips.
Heads with strap-shaped flowers, several to numerous in a flat-topped inflorescence; involucres 8-10 mm tall, bell-shaped; involucral bracts hairy with long and short glandular or non-glandular hairs and more or less white-woolly hairs, the outer ones about 8, linear, abruptly sharp-pointed, up to about 1/2 as long as the 10-15 inner ones, these lanceolate, strongly tapering to a slender tip, fringed with small hairs at the tips, glabrous within, becoming strongly keeled in fruit; receptacles honeycombed, fringed with small hairs within; ray flowers yellow or sometimes red at the summit, up to 11 mm long.
Achenes golden brown, 2.5-4 mm long, spindle-shaped, gradually tapering to the apex, 10-ribbed, the ribs broad, rounded, smooth or rough-hairy; pappus white, of hairlike bristles, 2-seriate, more or less united at the base, deciduous.
Source: The Illustrated Flora of British Columbia