Flora of North America species comparison

usually prostrate or twining, rarely ascending, rarely viscid, glabrous, puberulent, or villosulous, hairs silvery or grayish, spreading or reflexed.

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

trifoliolate;

stipules persistent, linear to lanceolate, 1–6 × 1–2 mm, apex acuminate, surfaces puberulent to villosulous;

petiole 4–100 mm, glabrous, tomentulose, or villosulous;

leaflet blades rhombic-orbiculate, rhombic, subrhombic, or ovate, 30–90 × 5–70 mm, membranous or nearly leathery, gland-dotted, base obtuse to rounded, cuneate, or truncate, apex acuminate to obtuse, surfaces glabrous, puberulent, or sparsely to densely villosulous abaxially, glabrous or finely strigose, villosulous, or puberulent 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, longer than leaves, 2–20 cm.

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

1–5 mm.

1–4 mm.

calyx 3–6 mm, puberulent or villosulous, tube 1.5–2 mm, lobes lanceolate, laterals 1.5–4 mm, lengths to 2.5 times tube, adaxials 0.5–1 mm;

corolla yellow, veined purple or brown;

banner orbiculate-ovate, 4–6 × 3–5 mm, emarginate, puberulent, gland-dotted;

wings narrowly oblong, 4.5–5 × 1–2 mm, narrowly gland-dotted, puberulent apically;

keel 5–6 × 2–3 mm, glabrous;

stamens 5–7 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.

falcate to oblong-ovoid, compressed, 9–20 × 3–5 mm, glabrous, puberulent, or villosulous.

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

grayish, brown, black, or mottled, ovoid-reniform, plump, 3–4 × 2–3 mm.

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

= 22.