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General:
Annual herb from a taproot; stems prostrate to creeping and often rooting at the nodes, hairy.
Leaves:
Alternate or clustered, palmately compound; leaflets 3, egg- to heart-shaped, rounded and notched at the tip, 10-15 mm long; stipules wide, tapered.
Flowers:
Inflorescence a dense, rather long-stalked bur-like head, about 1 cm wide, of several to many pea-like flowers, the outer flowers 2 to 8 and fertile, the inner numerous and sterile, the heads lacking involucres, on rather long stalks that in fruit curve and grow into the ground; corollas white or cream-coloured to pinkish, 8-13 mm long; fertile calyces 5-6 mm long, 1/2 as long as the corollas, the teeth long, hairy, bristle-like; sterile calyces stalk-like with 4-5 spreading bristles at the tip, elongating and curving backward to envelop the fruits and form a bur.
Fruits:
Pods; seeds 1.
Source: The Illustrated Flora of British Columbia
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