General:
Perennial shrub; stems much branched, densely woolly, 0.5-1.3 (2.0) m tall.

Leaves:
Threadlike to linear-lanceolate, 1-7 cm long, 1-4 mm wide, 1-3 nerved, grey- to white-woolly.

Flowers:
Heads discoid, numerous in a compact terminal cluster; involucres 7-13 mm tall; involucral bracts 20-25, strongly graduated, obtuse or abruptly sharp-pointed, mostly linear-lanceolate to lanceolate; more or less woolly; disk flowers usually 5, 8-13 mm long, yellow.

Fruits:
Achenes appressed, short-hairy; pappus whitish, of numerous hairlike bristles.

Source:  The Illustrated Flora of British Columbia