E-Flora BC: Electronic Atlas of the Flora of British Columbia

General:
Perennial herb from a rhizome; stems climbing, 0.8-2 m long, broadly winged, glabrous.

Leaves:
Alternate, pinnately compound with 2 leaflets; leaflets lance-elliptic to narrowly egg-shaped, up to 15 cm long and 5 cm wide; tendrils well developed, grasping; stipules broadly lance- to egg-shaped, 3-5 cm long, 2-lobed, the upper lobe 2-3 times as long as the lower.

Flowers:
Inflorescence a stalked, axillary cluster of 5 to 15 pea-like flowers; corollas magenta-pink, rarely white, 15-20 mm long, the banner-claw about 2/3 as long as the blade, the wings shorter than the banner but longer than the keel; calyces 8-12 mm long, the lanceolate teeth nearly as long as the tube.

Fruits:
Pods, 6-10 cm long, 7-10 mm wide, glabrous; seeds 10 to 25.