Distribution: Chiefly in south-central California, rare in the Pacific Northwest.
Habitat: Usually on saline soil.
Flowers: March - May
Conservation Status: Endangered in Washington (WANHP)
Slender, puberulent annual, the erect or spreading stems 0.5-2 dm. tall.
Basal leaves 2-6 cm. long, pinnatifid into linear segments; cauline leaves alternate, mostly linear, entire, not auriculate.
Inflorescence of open, bractless, elongate racemes; pedicles distinctly flattened, spreading, often S-shaped, slightly longer than the fruits; sepals 4, 0.5 mm. long; petals 4, white, up to 0.5 mm. long, often wanting; stamens 4; style lacking.
Silicles ovate, 2.5-3.5 mm. long and 2-2.5 mm. broad, strongly obcompressed, glabrous, finely net-veined, deeply lobed, the 2 lobes nearly 1 mm. long.