Flora of North America species comparison

usually ascending or erect, rarely twining, glabrous or sparsely to densely hirtellous, hairs grayish.

prostrate (twining distally), hirtellous, hairs grayish.

usually unifoliolate, distalmost rarely trifoliolate;

stipules persistent, lanceolate to ovate-lanceolate, 4–15 × 1–4.5 mm, apex acute to acuminate;

petiole 15–45 mm, hirtellous;

leaflet blades suborbiculate to reniform or ovate to oblong, 20–50 × 25–70 mm, leathery, gland-dotted, base truncate, broadly rounded to cuneate, or subcordate, apex obtuse, broadly rounded, emarginate to mucronate, surfaces reticulate and hirtellous abaxially, rugose and strigulose, glabrescent adaxially.

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.

crowded in densely packed heads, flowers numerous, shorter than leaves, 1–3.5 cm.

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

1–3 mm.

3–8 mm.

calyx 7–10 mm, densely hirtellous, gland-dotted, tube 1.5–2 mm, lobes linear-lanceolate, laterals 7–8 mm, adaxials 2 mm;

corolla yellow;

banner elliptic-ovate, 6.5–7 × 6–6.5 mm, emarginate, glabrous;

wings narrowly oblong, 6.5–7 × 1.5–2.5 mm, glabrous;

keel 6.7–7 × 2–2.5 mm, glabrous;

stamens 6–7 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-ellipsoid, compressed, 13–18 × 5–7 mm, gland-dotted, hirtellous.

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

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

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

, herbaceous.

, herbaceous.