Distribution: Distributed widely throughout Washington; British Columbia to Baja California, east to Montana and Arizona.
Habitat: Moist meadows, sandy riverbanks and drier hillsides, coastal to mid-elevations in the mountains.
Conservation Status: Not of concern
Villous annual, the stems 1-7 dm. long, prostrate to erect.
Leaves trifoliate, petiolate; leaflets obovate-oblanceolate, 1.5-2.5 cm. long; stipules ovate to ovate-lanceolate, denticulate, about half as long as the leaflets.
Inflorescence of 10- to 60-flowered, involucrate heads, 5-10 mm. long, on long, axillary peduncles; involucre villous, sometimes exceeding the lower flowers, saucer-shaped, with about 10 entire, shallow, acute lobes; calyx pubescent, the 5 teeth bristle-like, longer than the tube; corolla 4-5 mm. long, white to pinkish
Pod 2-3 mm. long, 1- or 2-seeded, usually rupturing the calyx at maturity.