Flora of North America species comparison

erect, suberect, decumbent, procumbent, or twining, viscid, hirsute, hairs yellowish.

erect and wiry, villosulous to puberulent, hairs silvery.

trifoliolate;

stipules persistent, linear to narrowly lanceolate, 3–9 × 0.5–1.5 mm, apex acute to acuminate, surfaces hirsute;

petiole 15–55 mm, hirsute;

leaflet blades lanceolate to obovate-oblong or ovate-deltate, 15–70 × 10–60 mm, membranous or leathery, gland-dotted, often viscid, base obtuse to rounded or truncate, margins ciliate, slightly revolute, apex acute to acuminate, surfaces strongly reticulate and sparsely to densely hirsute abaxially, strigulose to strigose adaxially.

trifoliolate;

stipules persistent, linear, 1 × 0.5 mm, apex acuminate;

petiole 1–3 mm, puberulent;

leaflet blades elliptic, 5–20 × 4–10 mm, leathery, gland-dotted abaxially, base cuneate, margins revolute, apex acute to obtuse, frequently apiculate, surfaces puberulent abaxially, finely strigose adaxially.

racemes, equal to or longer than leaves, 2.5–20 cm.

1(2 or 3) simple flowers per axil, longer than leaves, 0.7–1.5 cm.

1–3 mm.

3–5 mm.

calyx 4–7 mm, hirsute, tube 1.5–2 mm, lobes lanceolate, laterals 2–2.5 mm, lengths to 2.5 times tube, adaxials 1.5–3 mm;

corolla yellow, striped reddish brown or purple;

banner widely ovate to obovate, 7–10 × 4–5 mm, slightly apiculate, hirtellous and gland-dotted;

wings narrowly oblong, 6.5–9 × 1.5–2 mm, gland-dotted, puberulent apically;

keel 6.5–9 × 2–3 mm, glabrous;

stamens 6–9 mm.

calyx 5–8 mm, hirtellous, tube 1.5–3 mm, lobes lanceolate, laterals 4.5–5 mm, lengths to 2.5 times tube, adaxials 1–1.5 mm;

corolla yellow, veined purple;

banner obovate to orbiculate, 8–10 × 7–10 mm, emarginate, glabrous;

wings narrowly oblong, 8.5–10 × 2–2.5 mm, glabrous;

keel 9–10 × 4–5 mm, glabrous;

stamens 10–12 mm.

oblong-ovoid, compressed, 16–26 × 6–8 mm, often viscid, long-hirsute to puberulent, hairs intermixed, glabrescent.

oblong or oblong-lanceoloid, compressed, 10–20 × 5–9 mm, puberulent.

greenish brown or mottled, widely ovoid to subglobose, compressed, 4–5 × 3–4 mm.

brown, black, or mottled, subglobose, compressed, 2–3 × 2–3 mm;

hilum ovate, 0.5–1 mm.