Distribution: East of the Cascades and in the Columbia River Gorge in Washington; widely distributed throughout nearly all of North America.
Habitat: Weed of dry places.
Origin: Introduced from Eurasia
Conservation Status: Not of concern
Annual, 3-10 dm. tall, the stem usually simple below and pubescent with simple and forked to stellate, stiff hairs, becoming sparingly branched and often glabrous above.
Leaves alternate, mostly cauline, lanceolate to oblanceolate, entire, 2-8 cm. long, short-petiolate below and sessile and auriculate above, pubescent as the stem.
Inflorescence of elongate, open, simple or compound racemes; pedicels slender, spreading-ascending, 10-15 mm. long; sepals 4, 3 mm. long; petals 4, pale yellow to nearly white, spatulate, 4-5 mm. long; stamens 6; style slender, 2-2.5 mm. long; stigma not lobed.
Silicles obovate in outline, 5-7 mm. long and 3-4 mm. broad, inflated and bi-convex, obtuse at the tip, the valves 1-nerved.