Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout North America.
Habitat: Weed of disturbed ground.
Origin: Introduced from Europe
Growth Duration: Annual
Conservation Status: Not of concern
Pollination: Bees, flies, butterflies
Annual, the stems simple or branched, 1-5 dm. tall, with stellate and simple, stiff hairs.
Basal leaves in a rosette, oblanceolate, 3-6 cm. long, sub-entire to lyrate-pinnatifid, petiolate; cauline leaves alternate, sessile and clasping, lanceolate to oblong-oblanceolate, remotely serrate.
Inflorescence of many-flowered, open racemes; pedicles slender, spreading, 7-15 mm. long; sepals 4, 2 mm. long; petals 4, white, spatulate-obovate, 1.5-4 mm. long; stamens 6; style short, slender, persistent.
Silicles triangular-obcordate, strongly flattened, 4-8 mm. long and 3-5 mm. broad at the tip, truncate to slightly notched.