Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Montana, Wyoming, and Nevada.
Habitat: Stream banks and moist soil, low to mid-elevations in the mountains
Growth Duration: Annual, Biennial
Conservation Status: Not of concern
Mostly glabrous annual or biennial herbs, the stems 1-4 dm. tall, diffusely branched to simple and branched only above.
Leaves variable, 2-7 cm. long, mostly oblong-oblanceolate, entire, toothed, pinnately parted or pinnatifid, the segments linear to ovate, entire or toothed.
Inflorescence of bractless racemes; pedicles spreading, 2-4 mm. long; sepals 4, 1-2 mm. long; petals 4, yellow, 1-2 mm. long; stamens 6; style 0.3-1 mm. long.
Siliques 6-15 mm. long and 1-1.5 mm. broad, nearly terete, usually curved; seeds in 2 series.