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General:
Perennial herb from a heavy taproot and branching stem-base; stems several, clumped, stout, ascending to erect, 30-80 cm tall, with long, wavy, unbranched hairs.
Leaves:
Alternate, pinnately compound, 6-14 cm long, nearly unstalked; leaflets 15 to 33, oblong-elliptic, blunt or notched at the tip, 1.5-3.5 cm long, hairy beneath, nearly glabrous above; stipules pale, somewhat membranous, 3-12 mm long, the lowest fused into a sheath or their bases merely running down the stem, the upper ones long-tapering and free.
Flowers:
Inflorescence an axillary raceme of 15 to 35 nodding, pea-like flowers, the racemes 3-15 (20) cm long on stalks 6-12 cm long; corollas white or yellowish-white, sometimes with a purple-tipped keel, 1.5-2.5 cm long, the banner longer than the wings, which are considerably longer than the keel; calyces 7-11 mm long, black-hairy, the tube bulging on one side at the base, the awl-shaped teeth about 1/2 as long as the tube.
Fruits:
Pods, narrowly cylindric, drooping on stalks 5-11 mm long, glabrous, becoming somewhat leathery, 2-3.5 cm long, deeply grooved beneath, 2-chambered.
Source: The Illustrated Flora of British Columbia
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