Flora of North America species comparison

prostrate, solid, hirsute.

twining, solid, sericeous.

stipules spreading, ovate-lanceolate, 2.3–6.2 × 1.5–2 mm;

petiole 2–5 cm, hirsute;

rachis 5–7 mm;

stipels subulate or linear, 1–2.5 mm;

leaflets leathery, blades linear, base rounded or cuneate, margins entire, apex acute, surfaces densely hispid abaxially, glabrescent adaxially;

lateral blades 3.8–4.5 × 0.9–1.1 cm, terminal blades 2.5–4.2 × 0.5–0.8 cm.

stipules retrorse, lanceolate or ovate, 5–6 × 1.8–2 mm;

petiole 3.5–8 cm, canescent;

rachis 5–8 mm;

stipels linear, 1.2–2.5 mm;

leaflets papery, blades elliptic or ovate, base cuneate or obtuse, apex acute, surfaces often canescent abaxially, strigose adaxially;

lateral blades 3.3–4 × 2.7–3.3 cm, 2-lobed, terminal blades often hastate, 4.5–4.7 × 3–4.3 cm.

11–15 cm, (cleistogamous inflorescence above soil, 3.9–6.3 mm, flowers 6 mm, corolla whitish), axes glabrous;

tufts of bracts at base of peduncle mostly caducous;

extrafloral nectaries inconspicuous at nodes;

bracts and bracteoles subulate.

26–36 cm, axes pilose;

tufts of bracts at base of peduncle persistent, 5.5 mm, lanceolate, canescent;

extrafloral nectaries conspicuous at nodes;

bracts and bracteoles lanceolate or subulate.

0.6 mm.

1–2 mm.

0.9 cm;

calyx campanulate, 2–2.3 mm, hirsute or glabrescent, calyx lobes as long as the tube or longer;

corolla red;

banner obovate, 5.3 × 5 mm;

wings oblong-ovate, 8.1–8.9 × 3.2–5.4 mm;

keel 6.2 mm;

ovary nectary disc distally even;

ovules 4.

1.7–3 cm;

calyx campanulate, 6.2–8 mm, canescent, calyx lobes shorter than tube;

corolla purple-black;

banner oblong, 13–17 × 9–10.4 mm;

wings obovate, 13–24 × 8–14.3 mm;

keel 9–16 mm;

ovary nectary disc distally oblique;

ovules 13.

pendent, oblong-falcate, 1 × 0.2–0.3 cm, valves not twisting at dehiscence.

patent, linear, 7–10 × 0.3–0.4 cm, valves twisting at dehiscence.

2 or 3 (or 4), reniform, 1.7–2.3 × 1.2–3.5 mm.

12 or 13, oblong, 3.5–5.2 × 2–3.2 mm.

, perennial;

root elongate.

= 22.