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

General:
Annual herb from a taproot; stems erect, slender, simple to branched, more or less downsweptly short-hairy below, becoming glabrous above, usually purplish sticky-glandular in bands below the nodes or occasionally nonglandular, 20-80 cm tall.

Leaves:
Basal leaves oblanceolate to spoon-shaped, 3-6 cm long and 2-20 mm wide; stem leaves opposite, several pairs, oblanceolate to linear, glabrous to rough-hairy or short-hairy; stipules lacking.

Flowers:
Inflorescence of few to many flowers in a compact to open cluster; petals 5, white to pink, usually withered by day, stalklike at the bases, the narrow stalks about 2-3 times as long as the heart-shaped blades; sepals 5, united, forming a tube 4-10 mm long, 10-nerved, glabrous.

Fruits:
Capsules egg-shaped, 3-chambered; seeds blackish, 0.6-1.0 mm long, with 3-4 concentric rows of low pimples.