Flora of North America species comparison

usually prostrate or twining, rarely subascending, puberulent to strigulose or villosulous, hairs silvery.

trifoliolate;

stipules persistent, linear or linear-lanceolate, 1.5–3 × 0.5 mm, acute to acuminate;

petiole 5–35 mm, puberulous, strigulose, or villosulous;

leaflet blades lanceolate-ovate, 5–45 × 20–25 mm, leathery, gland-dotted, base obtuse or subcordate, margins revolute, apex acute or obtuse, surfaces puberulent, strigulose, or villosulous.

1(2 or 3) simple flowers per axil, shorter than leaves, 0.6–1.5 cm.

1–6 mm.

calyx 3–5 mm, villous or villosulous, tube 1.5–2.5 mm, lobes subulate, laterals 1–3.5 mm, lengths to 2.5 times tube, adaxials 0.5–2 mm;

corolla yellow, veined brown;

banner widely ovate, 5–7 × 3.5–5 mm, apex emarginate, puberulent;

wings oblong to ovate, 5–6 × 1–2 mm, glabrous;

keel 5–6.5 × 2–2.5 mm, glabrous;

stamens 4–6 mm.

oblong, compressed, 15–25 × 4–6 mm, puberulent-hirtellous, hairs intermixed.

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

= 22.