Flora of North America species comparison

prostrate or twining, tomentulose, hairs silvery or grayish.

erect and wiry, villosulous to puberulent, hairs silvery.

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.

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

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

2–4 mm, viscid.

3–5 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.

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.

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

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

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

hilum linear, 1–1.5 mm.

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

hilum ovate, 0.5–1 mm.