Flora of North America species comparison

prostrate, to 1.2 m, moderately white-pubescent and glandular-setose.

climbing, twining, or prostrate, pubescent to glabrate.

0.5–6 cm;

stipules deltate-ovate, 5–7 × 1–2.5 mm;

leaflets 5, usually folded when dry, axis recurved, blades orbiculate to elliptic, 4–20 × 4–22 mm, base obtuse to subcordate, apex obtuse to emarginate, mucronulate, surfaces puberulent to glabrate abaxially, glabrous adaxially.

alternate, odd-pinnate;

stipules present, usually caducous;

petiolate;

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

1–5-flowered, fasciculate.

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

bracts present, stipulelike;

bracteoles usually absent.

3–20 mm.

calyx (3–)4–5 mm, puberulent and setose;

tube (2–)3–4 mm × 3 mm;

lobes deltate-subulate, 1 mm;

corolla (8–)10–15 mm.

papilionaceous;

calyx nearly actinomorphic, campanulate, lobes 5;

corolla yellow [white or purplish];

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

anthers dorsifixed.

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.

5 × 3 mm.

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

hilum relatively small, circular.

2–5-segmented, 20–40 mm, pubescent to glabrate;

fertile segments 7–10 × 3–7 mm, sterile segment 6–11 × 3–7 mm;

stipe 1–2 mm.

, perennial, herbaceous or ± woody, unarmed.