Flora of North America species comparison

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

erect, suberect, decumbent, procumbent, or twining, viscid, hirsute, hairs yellowish.

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.

trifoliolate;

stipules persistent, linear to narrowly lanceolate, 3–9 × 0.5–1.5 mm, apex acute to acuminate, surfaces hirsute;

petiole 15–55 mm, hirsute;

leaflet blades lanceolate to obovate-oblong or ovate-deltate, 15–70 × 10–60 mm, membranous or leathery, gland-dotted, often viscid, base obtuse to rounded or truncate, margins ciliate, slightly revolute, apex acute to acuminate, surfaces strongly reticulate and sparsely to densely hirsute abaxially, strigulose to strigose adaxially.

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

bracts present, striate.

racemes, equal to or longer than leaves, 2.5–20 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 4–7 mm, hirsute, tube 1.5–2 mm, lobes lanceolate, laterals 2–2.5 mm, lengths to 2.5 times tube, adaxials 1.5–3 mm;

corolla yellow, striped reddish brown or purple;

banner widely ovate to obovate, 7–10 × 4–5 mm, slightly apiculate, hirtellous and gland-dotted;

wings narrowly oblong, 6.5–9 × 1.5–2 mm, gland-dotted, puberulent apically;

keel 6.5–9 × 2–3 mm, glabrous;

stamens 6–9 mm.

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

oblong-ovoid, compressed, 16–26 × 6–8 mm, often viscid, long-hirsute to puberulent, hairs intermixed, glabrescent.

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

greenish brown or mottled, widely ovoid to subglobose, compressed, 4–5 × 3–4 mm.

= 11.