Flora of North America species comparison

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

not winged, sprawling, branched along trailing stems several times, 2–6 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.

0.5–2 cm;

tendrils well developed;

stipules filiform-linear, 5–10 × 1–3 mm, much smaller than leaflets;

leaflets 2, blades lanceolate, 10–40 × 5–15 mm, surfaces glabrous.

4–8-flowered, 3–10 cm.

4–6-flowered, 6–15 cm.

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.

8–12 mm;

calyx lobes unequal, lateral lobes linear-triangular, equal to tube;

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

ovary glabrous, style rotated 90° from ovary axis.

20–30 × 9–13 mm.

20–30(–40) × 3–6 mm.

= 28.

= 14.