Flora of North America species comparison

prostrate, procumbent, twining, ascending, or erect, pubescent or glabrous.

usually trailing or twining, rarely suberect, hirsute, hairs tawny.

alternate, unifoliolate or trifoliolate;

stipules present, striate;

petiolate;

stipels deciduous;

leaflets 1 or 3, 0.5–2.5 mm, blade margins entire, surfaces gland-dotted abaxially, sometimes also adaxially, pubescent or glabrous.

usually trifoliolate, proximalmost sometimes unifoliolate;

stipules deciduous, subulate-lanceolate, 2.5–7.5 × 2–2.5 mm, apex acuminate;

petiole 20–60 mm, hirsute;

leaflet blades oval to ovate-rhombic or orbiculate, 30–80 × 10–60 mm, leathery, gland-dotted abaxially, base obtuse or subcordate, apex obtuse, acute, or abruptly acuminate, often mucronate, surfaces villous abaxially, strigose adaxially.

1–3-flowered, usually axillary, rarely terminal, usually racemes;

bracts present, striate.

racemes, longer than leaves, 5–20 cm.

1–3 mm.

papilionaceous;

calyx campanulate with relatively long lobes, or tubulous-campanulate with relatively short lobes, lobes 5;

corolla yellow, yellow-orange, or green-yellow, often with purple or brown tinge or streaks, (4–)6–12(–14) mm;

stamens 10, diadelphous;

anthers dorsifixed.

calyx 8–15 mm, hirsute, tube 2–3 mm, lobes lanceolate, laterals 7–10 mm, lengths 3+ times tube, adaxials 4 mm;

corolla yellow;

banner obovate, 9.5–14 × 6–7 mm, emarginate, hirtellous, gland-dotted;

wings oblong, 8.5–13 × 2–2.5 mm, glabrous;

keel 8.5–13 × 3–4 mm, glabrous;

stamens 8–12 mm.

legumes, sessile or subsessile, usually compressed, ovoid to ellipsoid, falcate, or acinaciform, beaked, dehiscent, gland-dotted, pubescent or glabrous.

ovoid-oblong, compressed, 15–20 × 7–9 mm, villous and puberulent, hairs intermixed.

1 or 2, subglobose, ovoid to ellipsoid, or reniform.

brown-gray or mottled, subglobose, compressed, 3–4 × 3–4 mm.

= 11.

= 22.