Flora of North America species comparison

angled, sprawling, basally branched 0–4 times, 1–4 dm.

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

1–3 cm;

tendrils flattened bristles;

stipules ovate to lanceolate, 10–27 × 5–12 mm, often larger than leaflets;

leaflets 4 or 6, paired, blades obovate to oblanceolate, 10–20 × 4–8 mm, surfaces densely villous.

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.

4–8-flowered, 3–10 cm.

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

13–15 mm;

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

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

ovary densely pubescent.

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.

20–30 × 9–13 mm.

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

= 28.

= 14.