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Annual herb from a taproot; stems decumbent to ascending, branched, spreading-hairy, 10-60 cm tall.
Basal leaves few, reduced and soon deciduous; stem leaves similar, opposite, more or less triangular in outline, spreading-hairy, 1.5-5 cm long, pinnately divided into 3-5 segments, these cleft or toothed 1/2 their length, terminal leaflet stalked; odoriferous.
Inflorescence of terminal and axillary clusters of 2 short-stalked flowers; petals pink to reddish-purple, soft-hairy at least 1/2 their length from the base, rounded at the tips, 8-13 mm long; sepals 6-9 mm long, bristle-tipped, the tip 1-2 mm long; stamens 10, fertile, not fused.
Carpels, 5-parted, short-hairy at the tips; styles 15-25 mm long, beaks 6-7 mm long; seeds oblong, obscurely pitted.
Source: The Illustrated Flora of British Columbia