Flora of North America species comparison

usually prostrate or twining, rarely erect, strigose or hirsute, hairs tawny or silvery.

usually trifoliolate, proximalmost sometimes unifoliolate;

stipules persistent, ovate or ovate-lanceolate, 3–10 × 1.5–3 mm, apex acute or long-acuminate;

petiole 10–65 mm, hirsute;

leaflet blades ovate to ovate-rhombic and orbiculate, or obovate to obovate-elliptic and elliptic, 20–60 × 10–70 mm, leathery, gland-dotted, base obtuse to rounded or subcordate, apex usually acute, obtuse, or rounded, rarely retuse, surfaces hirtellous or strigulose to loosely strigose abaxially, glabrous or strigose adaxially.

racemes, shorter than leaves, 1–4 cm.

2–5 mm.

calyx 9–12 mm, hirsute or hirtellous, tube 1–2 mm, lobes widely lanceolate or ovate-lanceolate, laterals 6–10 mm, adaxials 3–5 mm;

corolla deep yellow or orange-yellow;

banner broadly-obovate, 8–10.5 × 5–6 mm, emarginate, glabrous or puberulent, with a pair of internal callosities;

wings oblong, 7–8 × 2–3 mm, glabrous;

keel 7–8 × 2–3 mm, glabrous;

stamens 7–9 mm.

ovoid-oblong, compressed, 14–20 × 6–9 mm, gland-dotted, puberulent and hirsute, hairs intermixed.

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

= 22.