Flora of North America species comparison

usually prostrate, rarely climbing, strigose or villosulous, hairs cinereous, appressed or slightly spreading.

usually trifoliolate, proximalmost sometimes unifoliolate;

stipules persistent, lanceolate-ovate, 2–5 × 1–2 mm, apex acuminate;

petiole strigulose;

leaflet blades oval to orbiculate-ovate, obovate, or rhombic, 15–35 × 6–50 mm, leathery, gland-dotted, base obtuse or subcordate, apex obtuse or acute, surfaces hirtellous abaxially, rugose and finely strigose adaxially.

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

1–4 mm.

calyx 10–12 mm, hirtellous, tube 2 mm, lobes lanceolate, laterals 9–10 mm, lengths 3+ times tube, adaxials 3–3.5 mm;

corolla light yellow;

banner obovate, 8–11 × 6–8 mm, emarginate, puberulent;

wings oblong, 8.5–13 × 2.5–3 mm, glabrous;

keel 8–9.5 × 3–4 mm, glabrous;

stamens 8–10 mm.

ovoid-oblong, compressed, 13–17 × 6–8 mm, puberulent.

brown, black, or mottled, subglobose, compressed, 2.5–4 × 2–4 mm.