Flora of North America species comparison

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

prostrate (twining distally), hirtellous, hairs grayish.

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.

usually unifoliolate, distalmost rarely trifoliolate;

stipules persistent, ovate-lanceolate, 3–5 × 1.5–2 mm, apex acuminate;

petiole 20–40 mm, densely hirsute;

leaflet blades reniform or orbiculate, 20–50 × 20–70 mm, leathery, gland-dotted, base truncate or subcordate, apex obtuse, obscurely mucronulate, surfaces reticulate and tomentose-woolly abaxially, rugose and finely strigose adaxially.

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

in clusters on peduncles, shorter than leaves, 2–6 cm.

1–6 mm.

3–8 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.

calyx 14–16 mm, hirsute, tube 2 mm, lobes lanceolate or elliptic, laterals 12–14 mm, adaxials 5 mm;

corolla yellow-orange;

banner obovate, 10–12 × 5–6 mm, emarginate, puberulent, with a pair of internal callosities;

wings oblong, 9–11 × 2–2.5 mm, glabrous;

keel 9–10 × 2–2.5 mm, glabrous;

stamens 9–10 mm.

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

ovoid-oblong, compressed, 10–18 × 5–9 mm, gland-dotted, tomentose.

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

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

, herbaceous.

= 22.