General:
Annual herb from a taproot; stems weak, climbing or prostrate, solitary, few branched, square, short-hairy on the angles, the hairs pointed downwards, 40-100 cm tall/long.

Leaves:
Basal leaves few, soon deciduous; stem leaves in whorls of 8 (sometimes 6), linear lanceolate to lanceolate, 1-4 (7) cm long, lowermost stalked, upper ones unstalked, entire, awn-tipped, 1-veined, bristly-hairy along the margins, bristly-hairy above, with hooked hairs, the hairs pointed backwards.

Flowers:
Inflorescence of 3-5, stalked, terminal flowers on branchlets in most leaf axils; corollas saucer-shaped, greenish-cream, 1-1.5 mm wide, 4-lobed; calyces obsolete.

Fruits:
Nutlets, 2, 1.5-3 mm long, smooth or with numerous, short, hooked hairs.

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