Distribution: Currently restricted to a few counties west of the Cascades in Washington; Alaska south to Utah, east across Canada and the U.S. to the Atlantic Coast.
Habitat: Disturbed soil and waste ground.
Origin: Introduced from Europe
Conservation Status: Not of concern
Biennial or short-lived perennial from a taproot, garlic-scented, the usually single stem erect, simple below the inflorescence, 3-10 dm. tall; herbage sparsely pubescent with simple hairs.
Basal leaves with reniform blades on slender petioles; cauline leaves alternate, numerous, petiolate, the blade deltoid, 3-6 cm. broad, coarsely wavy-toothed.
Inflorescence a simple or compound raceme, leafy-bracteate at base and bractless above, the pedicels stout, 2-6 mm. long; sepals 4, 3mm. long; petals 4, white, twice the length of the sepals, spatulate, short-clawed; stamens 6; style short, stout; stigma capitate.
Siliques 4-6 cm. long, quadrangular, spreading but arched upward, the tips often erect.