Flora of North America species comparison

angled, erect, sprawling, or climbing, basally branched 1–several times, 1–5 dm.

0.3–1 cm;

tendrils reduced to bristles on proximal leaves, well developed distally;

stipules lanceolate, 10–20 × 2–4 mm, as wide as leaflets;

leaflets 2, blades linear, 20–70 × 1–4 mm, surfaces glabrous.

1-flowered, 2–7 cm, prolonged beyond flower into tendril-like structure.

8–10 mm;

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

corolla blue-purple, banner erect, blade equal to claw, wings equal to keel;

ovary glabrous.

20–40 × 3–5 mm, with indistinct reticulate venation.

= 14.