Distribution: Widely distributed throughout much of Washington; Alaska south to California, east to Montana, Wyoming, Utah, and Arizona.

Habitat: Dry, sandy soil to moist meadows.

Flowers: April-July

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Bumblebees, bees, butterflies, flies

Glabrous annual, the 1-several stems 1-6 dm. long, prostrate to erect.

Leaves trifoliate, petiolate; leaflets obovate to elliptic oblanceolate, 5-20 mm. long, the margins sharply serrate, the serrations with needle-like tips; stipules ovate, deeply lacerate.

Inflorescence of 3- to 40-flowered, involucrate heads 1-2 cm. broad on long axillary peduncles; involucres flaring and saucer-shaped, irregularly lobed and lacerate about half their length; calyx tube narrowly bell-shaped, 10-25 veined, the 5 teeth much longer than the tube, narrow and bristle-tipped; corolla pea-like, 5-20 mm. long, slightly longer than the calyx, purplish, often white-tipped, aging to purplish-brown.

Pod 1-2 seeded, usually rupturing the calyx.