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Perennial herb from a taproot and branching stem-base covered with persistent straw-coloured stipules; branches loosely tufted, often elongate, 2-9 cm long.
Basal, odd-pinnately compound, 2-9 cm long; leaflets 9 to 13, lanceolate to elliptic, 4-13 mm long, slightly white-hairy to glabrous; stipules about as long as the leaflets, with elliptic, blunt lobes, the margins fringed with black hairs.
Inflorescence a compact cluster of 1 to 5 pea-like flowers, the raceme-stalk 2-8 cm long, erect to ascending, and purplish under a cover of short white hairs; corollas purple, 12-17 mm long; calyces bell-shaped, densely black-hairy, the tube 4-6 mm long, the linear-lanceolate teeth about 1/2 as long as the tube.
Pods, oblong-ellipsoid, membranous, 11-18 mm long, unstalked, erect, black-hairy, more or less 1-chambered.
Source: The Illustrated Flora of British Columbia