Flora of North America species comparison

angled, sprawling or climbing, sometimes branched at flowering nodes, 2–6 dm.

not winged, erect, sprawling or climbing, basally branched 1–several times, 2–5 dm.

5–9 cm;

tendrils usually well developed;

stipules lanceolate to linear, 8–12 × 1–5 mm, much smaller than leaflets;

leaflets 4–8, scattered, blades usually linear, rarely lanceolate, 30–80 × 1–20 mm, surfaces glabrous.

0.5–1.5 cm;

tendrils bristlelike to 4 cm, often unbranched;

stipules linear, 10–15 × 2–10 mm, much smaller than leaflets;

leaflets 2, blades linear, 20–90 × 2–10 mm, surfaces glabrous.

5–8-flowered, 10–18 cm.

1-flowered, 1–2 cm, prolonged beyond flower into a bristle.

8–15 mm;

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

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

ovary glabrous.

6–10 mm;

calyx lobes subequal, lateral lobes lanceolate, longer than tube;

corolla reddish orange, banner erect, blade longer than or equal to claw, wings equal to keel;

ovary glabrous.

30–50 × 4–8 mm.

40–60 × 4–6 mm, longitudinal venation prominent.

= 14.

= 14.