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.

prostrate or twining, tomentulose, hairs silvery or grayish.

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.

trifoliolate;

stipules persistent, subulate, 1–2 × 0.5–1 mm, apex acute to acuminate, surfaces tomentulose;

petiole 4–30 mm, tomentulose;

leaflet blades obovate or elliptic-lanceolate, 10–45 × 5–20 mm, leathery, gland-dotted, base obtuse, apex usually rounded or obtuse, rarely acuminate, surfaces strongly reticulate and densely grayish tomentulose abaxially, densely grayish tomentulose adaxially.

racemes, longer than leaves, 2–20 cm.

racemes, shorter than or equal to leaves, 2–6 cm.

1–5 mm.

2–4 mm, viscid.

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 5–7 mm, tomentose, viscid, tube 2–2.5 mm, lobes lanceolate, laterals 4–5 mm, lengths to 2.5 times tube, adaxials 2.5–5 mm;

corolla pale yellow;

banner suborbiculate, 8–10 × 6–7 mm, emarginate, puberulent, gland-dotted;

wings oblong, 8–9 × 2.5–3 mm, glabrous;

keel 8–9.5 × 2–2.5 mm, glabrous;

stamens 8–10 mm.

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

ellipsoid, compressed, 15–17 × 4–6 mm, yellow-hirsute and puberulent, hairs intermixed.

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

brown, black, or mottled, ovoid-ellipsoid, compressed, 2.5–4 × 2.5–3 mm;

hilum linear, 1–1.5 mm.

= 22.