General:
Annual herb from a taproot; stems erect, solitary or more often several, simple or sparingly branched, minutely bristly or glabrous, exuding milky juice when broken, 10-40 cm tall.

Leaves:
Basal leaves well-developed, oblanceolate, entire or lobed, glabrous to fringed on the margins, 2.5-15 cm long and 7-35 mm wide; stem leaves lacking or if present then minute and bractlike.

Flowers:
Heads with strap-shaped flowers, solitary to many in a terminal, flat-topped inflorescence; involucres 8-10 mm tall, 0.5-1.5 cm wide, increasing to 17 mm tall in fruit; involucral bracts spirally arranged, lanceolate, glabrous; ray flowers yellow.

Fruits:
Achenes nerved with minute projections, 4-5 mm long, inner ones with a well-developed beak as long as the body; pappus double, the inner ones of feathery bristles, the outer ones shorter and usually merely finely-barbed.

Source:  The Illustrated Flora of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration Source:  The Illustrated Flora of British Columbia