Flora of North America species comparison

procumbent, trailing, or twining, villous or villosulous, hairs silvery, spreading.

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

usually unifoliolate, distalmost rarely trifoliolate;

stipules persistent, ovate-lanceolate, 2–5 × 1–2.5 mm, apex acuminate;

petiole 10–45 mm, villosulous;

leaflet blades suborbiculate to reniform, 15–40 × 20–55 mm, leathery, gland-dotted, base cordate, apex broadly rounded, surfaces villosulous abaxially, rugose and finely strigose adaxially.

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.

racemes, shorter than leaves, 1.5–5 cm.

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

2–5 mm.

1–4 mm.

calyx 7–13 mm, villosulous, tube 1.5–2 mm, lobes lanceolate, laterals 6–10 mm, adaxials 2–4 mm;

corolla yellow, often tinged brown;

banner obovate, 8.5–10 × 6.5–7.5 mm, emarginate, puberulous;

wings narrowly oblong, 6.5–7.7 × 2–2.5 mm, glabrous;

keel 8–9 × 3–3.5 mm, glabrous;

stamens 7.5–8.5 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.

oblong-ovoid, compressed, 10–15 × 5–8 mm, villosulous.

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

brown, black, or mottled, subglobose, compressed, 3–4 × 3–3.5 mm.

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

, herbaceous.

= 22.