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General:
Annual herb from fibrous roots; stems 1 to many, ascending to erect, 5-35 cm tall, glabrous or sparsely glandular.
Leaves:
Alternate, palmately compound; leaflets 3, linear to narrowly oblanceolate, 5-25 mm long, fine-toothed to nearly entire; stipules narrowly egg-shaped, the margins jagged-toothed, 1/4 as long as the leaflets.
Flowers:
Inflorescence a small head, 3-12 mm wide, of 3 to 10 (15) pea-like flowers, the heads on long slender stalks and set in flat, wheel-like involucres, the involucres deeply but irregularly spiny-toothed to greatly reduced; corollas lavender with white tips, 4-8 mm long; calyces 4-7 mm long, the tube narrowly bell-shaped, 10-veined and deeply slit between the upper teeth, the teeth narrowly lanceolate, tapered to a sometimes forked bristle-tip.
Fruits:
Pods; seeds usually 2.
Source: The Illustrated Flora of British Columbia
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