Flora of North America species comparison

narrowly to broadly winged, sprawling or climbing, basally branched 0–4 times, 2–10 dm.

not winged, sprawling or climbing, branched along trailing stems several times, 4–10 dm.

1–6 cm;

tendrils well developed;

stipules ovate-lanceolate to linear, 5–25 × 1–10 mm, much smaller than leaflets;

leaflets 4–8, paired, blades lanceolate to linear, 15–75 × 2–20 mm, surfaces glabrous, glabrate, or pubescent.

1–4 cm;

tendrils bristlelike to well developed;

stipules ovate-lanceolate, 5–38 × 3–15 mm, sometimes equal to leaflets;

leaflets 2, blades lanceolate, 5–40 × 1–10 mm, surfaces glabrous or pubescent.

2–7-flowered, 3–15 cm.

5–10-flowered, 4–16 cm.

10–15 mm;

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

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

ovary glandular-pubescent.

8–12 mm;

calyx lobes unequal, lateral lobes linear-triangular, longer than tube;

corolla yellow, banner erect, blade equal to claw, wings equal to keel;

ovary glabrous or pubescent.

25–60 × 4–8 mm.

15–35 × 5–7 mm.

= 14.

= 9, 14, 16, 21, 28, 42.