Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California and southwestern U.S., eastward to also occurring throughout central and eastern North America.

Habitat: Escaping from cultivation to roadsides, pastures, and other disturbed areas, often where moist.

Flowers: April-August

Origin: Introduced from the western Mediterranean

Growth Duration: Annual, Perennial

Conservation Status: Not of concern

Pollination: Bees, flies, butterflies

Grayish, spreading annual with fragrant flowers, the stems branched from the base, 1-3 dm. tall; herbage with small, appressed, aligned, pick-shaped hairs.

Leaves alternate, linear-oblanceolate, entire,1-4 cm. long and 1-4 mm. broad.

Inflorescence usually of several terminal racemes; pedicles slender, spreading, 5-10 mm. long; sepals 4, 1.5-2 mm. long, soon deciduous; petals 4, white or bluish-tinged, 3-4 mm. long, broadly ovate and short clawed; stamens 6, glands flanking the short filaments oblong, 1 mm. long; style 0.5 mm. long.

Siliques often purplish, oval-elliptic, strongly compressed, 2.5-3.5 mm. long, acute, sparsely hairy; seeds 1 per cell.