Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.

Habitat: Roadsides, waste places, and other disturbed areas.

Flowers: May-August

Origin: Introduced from Eurasia

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Bees, flies, butterflies

Glabrous, glaucous annual, the simple stem 3-7 dm. tall.

Basal leaves obovate to oblanceolate, narrowed gradually to the base, entire, 5-9 cm. long; cauline leaves alternate, oblong-lanceolate, sessile and cordate-clasping.

Inflorescence a few-flowered, flat-topped, bractless raceme, becoming elongate and loose; pedicles ascending, 10-15 mm. long; sepals 4, erect, 6-8 mm. long, acute, the lateral pair basally saccate; petals 4, cream to lemon, 7-12 mm. long, slenderly clawed, the blades narrowly obovate; stamens 6; style thick, 1 mm. long.

Siliques linear, terete, 8-13 cm. long and 1.5-2 mm. thick, tapered to a slender tip.