General:
Annual or biennial herb from a slender taproot; stems erect, 1-several, more or less crisp-hairy, 20-60 cm tall.

Leaves:
Basal and stem leaves opposite, linear, appressed, 4-10 cm long, 2-5 mm wide, crisp short-hairy, reduced above; stipules lacking.

Flowers:
Inflorescence in dense, 2- to many-flowered, terminal cluster(s); petals 5, pink to red with pale dots, the stalks 4-5 mm long, narrowly stalklike at the base, the blades more or less egg-shaped, toothed; sepals 5, united, forming a woolly-hairy tube about 15 mm long, 20- to 25-nerved, 5-toothed.

Fruits:
Capsules cylindric, about 15 mm long, 4-valved; seeds comápressed, concave on one side, 1-2 mm long.

Source:  The Illustrated Flora of British Columbia