Flora of North America species comparison

broadly winged, climbing, basally branched 1–3 times, 8–20 dm.

2–4 cm, rachises winged as the stem;

tendrils well developed;

stipules lanceolate, 15–25 × 5–10 mm, smaller than leaflets;

leaflets 2, blades ovate or obovate to lanceolate, 25–60 × 5–35 mm, surfaces glabrous.

1–3-flowered, 4–20 cm.

20–30 mm;

calyx lobes equal, lateral lobes deltate, usually shorter than tube;

corolla rose-purple, banner erect, blade longer than claw, wings longer than keel;

ovary glabrous, style rotated 90° from ovary axis.

70–100 × 8–12 mm, narrowly winged on abaxial suture.

= 14.