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Mat-forming perennial herb from a branching stem-base and taproot; stems few to several, slender, prostrate, 10-40 cm long, minutely appressed-hairy with white and black, unbranched hairs.
Alternate, pinnately compound, 1-7 cm long; leaflets 9 to 15, elliptic to oblong, 2-8 mm long, grey-green, frequently with purplish spots, white appressed-hairy, the margins sometimes inrolled; stipules 3-6 mm long, fused at the base and clasping the stem.
Inflorescence an axillary raceme, on stalks 3-10 cm long, of 1 to 4 pea-like flowers; corollas cream with splashes of pink or purple, 12-18 mm long; calyces bell-shaped, black appressed-hairy to nearly glabrous, the tube 3-4.5 mm long, the teeth triangular to linear, about 1/2 as long as the tube.
Pods, at first straight but becoming curved in a semicircle, 3-5 cm long, minutely black appressed-hairy, 1-chambered, the stalk 4-10 mm long, jointed to the deciduous pod.
Source: The Illustrated Flora of British Columbia