Flora of North America species comparison

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

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.

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

1–3 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.

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

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