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

Habitat: Weed of waste ground, low to moderate elevations.

Flowers: April-August

Origin: Introduced from Eurasia

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Bees, flies, butterflies

Glabrous annual, the stem simple to freely-branched, 1-5 dm. tall.

Basal leaves few, 2-6 cm. long, scalloped to almost lyrate, narrowed to a short petiole; lower cauline leaves similar to the basal, but gradually changing upward, ultimately sessile, auriculate, lanceolate to oblanceolate, and dentate to wavy-lobed.

Inflorescence a large, terminal, bractless raceme; pedicles slender, spreading to up-curved, 7-15 mm. long; sepals 4, erect,1.5-2.2 mm. long; petals 4, white, 3-4 mm. long; stamens 6; style nearly lacking.

Silicles strongly obcompressed, oval to oblong-obcordate, narrowly notched, 10-17 mm. long, wing-margined all around, the sinus 1.5-2.5 mm. deep; seeds in 1 series.