General:
Annual herb from a taproot; stem simple to much-branched, somewhat flimsy, sparingly spreading stiff-hairy, without shorter softer hairs except often in the inflorescence, 15-80 cm tall.

Leaves:
Basal leaves not forming a persistent tuft; stem leaves lance-oblong, elliptic, or linear, 2-12 cm long and 0.5-2.5 cm wide, alternate, entire.

Flowers:
Inflorescence a coiled cluster; petals yellow, fused into a tube 4-7 mm long that spreads (2-4 mm wide) at top to 5 shallow lobes, the throat open; calyx lobes 5, with both silky and longer, stiff hairs.

Fruits:
Nutlets 4, clustered together, 2-3.5 mm long, egg-shaped, warty or pimply and often wrinkled, greenish or grey to brownish-black.

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