Plant: Annual; hairs generally soft, wavy; stem decumbent to erect

Leaves: cauline, palmately compound; stipules often ± bristle-tipped; leaflets 0.8-2 cm, generally obovate, tip notched

INFLORESCENCE: head, 7-many-flowered, often bur-like in fruit; involucre bowl-shaped, lobes ± entire

Flowers: calyx 4-6 mm, tube 10-veined, lobes ± = or > tube, entire, unbranched, bristle-tipped; corolla 4-7 mm, pink to lavender; 9 filaments fused, 1 free

Fruit: legume, short, plump, rupturing corolla; Seeds 1-2

Misc: Streambanks, moist, disturbed areas, roadsides, serpentine, conifer forest; 200-2700 m.; Apr-Aug