E-Flora BC: Electronic Atlas of the Flora of British Columbia

General:
Annual herb from a fibrous root; stems erect, branched above, solitary, exuding milky juice when broken, 0.3-1.5 m tall.

Leaves:
Basal leaves lacking; stem leaves alternate, toothed or occasionally basally lobed, egg-shaped to almost round or rounded, thin, lower ones stalked, upper ones more or less unstalked, toothed, 2.5-10 cm long, 2-7 cm wide.

Flowers:
Heads with strap-shaped flowers, several to many in an elongate to rounded inflorescence; involucres 4-8 mm tall; involucral bracts linear-lanceolate, the mostly 8 bracts evidently keeled at least toward the base; ray flowers yellow, usually about 13.Fruits; Achenes nerved, oblong, curved, tips rounded, 3-5 mm long, glabrous; pappus lacking.