Distribution: Chiefly west of the Cascades in Washington; British Columbia south to southern California.
Habitat: Moist soil at low elevations, but not typically coastal.
Conservation Status: Not of concern
Mostly glabrous annual, the 1-several freely branched stems ascending, 5-20 cm. long.
Leaves narrowly linear, opposite, remote, 3-10 mm. long; basal leaves few, withered by flowering time.
Flowers several per stem, the pedicels filiform, 10-20 mm. long; sepals 5, distinct, about 2 mm. long, rounded; petals 5, white, equal to the sepals; stamens and styles 5.
Capsule about 1.5 times as long as the sepals, opening by 5 valves.