Distribution: Occurring east of the Cascades crest and in the Columbia River Gorge in Washington; Yukon Territory to California, east across North America to the Atlantic Coast.

Habitat: Sagebrush, roadsides, ponderosa pine forest openings, and disturbed sites in seasonally moist areas.

Flowers: May-July

Origin: Introduced from Eurasia

Growth Duration: Annual, Biennial

Conservation Status: Not of concern

Pollination: Bees, flies, butterflies

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.