Flora of North America species comparison

climbing, twining, or prostrate, pubescent to glabrate.

twining, to 1 m, moderately crisp-pubescent to glabrate, sometimes glandular-setose.

alternate, odd-pinnate;

stipules present, usually caducous;

petiolate;

leaflets 5(or 7), stipels absent, blade margins entire, surfaces puberulent, glabrate, or glabrous.

3–8 cm;

stipules lanceolate, 3–5 × 0.5–1 mm;

leaflets 5, usually not folded when dry, axis ± straight, blades elliptic to rhombic, 5–40 × 3–25 mm, base obtuse, apex acute to obtuse, mucronulate, surfaces glabrate.

1–8-flowered, axillary, fascicles or racemes [panicles];

bracts present, stipulelike;

bracteoles usually absent.

1–8-flowered, racemes or fascicles.

5–7 mm.

papilionaceous;

calyx nearly actinomorphic, campanulate, lobes 5;

corolla yellow [white or purplish];

stamens 10, monadelphous, filament tube splitting adaxially at maturity;

anthers dorsifixed.

calyx 5–7 mm, glabrous or glabrate, margins pubescent;

tube (2–)3–4 × 2–3 mm;

lobes subulate, 2–4 mm;

corolla (8–)10–12 mm.

loments, stipitate, flattened, lanceoloid, segments breaking apart, individual ones indehiscent, pubescent, glabrate, or glabrescent;

segments 2–4, proximal 1–4 segments fertile, distal segment sterile, flat, winglike.

1–4, reddish brown, laterally compressed, reniform, sublustrous;

hilum relatively small, circular.

3 × 2–2.5 mm.

, perennial, herbaceous or ± woody, unarmed.

2–4-segmented, 20–30 mm, pubescent to glabrate;

fertile segments 4–6 × 4–5 mm, sterile segment 10–15 × 6–10 mm;

stipe 1–2 mm.