Distribution: Occurring in the lowlands west of the Cascades crest in Washington; British Columbia south to California; Kansas.
Habitat: Waste ground.
Origin: Introduced from Europe
Conservation Status: Not of concern
Delicate annual with numerous, filiform, ascending stems 3-5 cm. long; finely glandular-pubescent above, especially in the inflorescence and calyx.
Leaves opposite, linear, 2-4 mm. long, with a few long hairs on their bases.
Pedicels filiform, 2-6 mm. long; sepals 4, rounded, 1.5-1.7 mm. long, erect in fruit; petals lacking; styles 4, alternate with the sepals; stamens 4.
Capsule about 1.5 times as long as the calyx.