Flora of North America species comparison

prostrate, solid, strigulose or hirsute.

twining, erect, semierect, or prostrate, slender, sometimes hollow, sparsely to densely pubescent.

stipules spreading, widely deltate or ovate, 4.5–8 × 2–2.7 mm;

petiole 1.7–6 cm, strigose or hirsute;

rachis 5–9 mm;

stipels subulate, 1–5.5 mm;

leaflets papery, blades orbiculate, ovate to broadly ovate or obovate, base attenuate or cuneate, apex acute or obtuse, surfaces strigose abaxially, hirtellous adaxially;

lateral blades 2–4.3 × 1.6–2.9 cm, sometimes 2-lobed, terminal blades 2.3–4.7 × 1.6–2.8 cm.

alternate, usually odd-pinnate, rarely unifoliolate;

stipules present, persistent, not prolonged proximally, veined; petiolate;

leaflets 3, stipels persistent, often reflexed, blade margins entire or 2-lobed, surfaces pubescent or glabrescent.

14–25 cm (cleistogamous inflorescence over soil, 1.5–2.2 mm, flowers 3.5 mm, corolla whitish), axes adpressed-pilose;

tufts of bracts at base of peduncle mostly caducous;

extrafloral nectaries inconspicuous at nodes;

bracts and bracteoles subulate or lanceolate.

6–12-flowered, axillary, pseudoracemes, cleistogamous flowers present in some species, with modified inflorescences, tufts of bracts present at base of peduncle, persistent or caducous, nodes swollen, glandular;

node bracts present, caducous or inconspicuous, bracteoles present, usually caducous.

0.7–1 mm.

mostly shorter than calyx tube.

1 cm;

calyx campanulate, 3.5–4.5 mm, hirtellous, calyx lobes as long as tube or longer;

corolla salmon-orange;

banner orbiculate, 5.5–7.5 × 4.5–6.5 mm;

wings oblong-ovate, 5.1–10 × 3.3–6.6 mm;

keel 4–8 mm;

ovary nectary disc distally even;

ovules 6.

papilionaceous;

calyx tubular or campanulate, lobes 5, lobes shorter to longer than tube, distinct or adaxial lobes partly connate;

petals connate;

corolla salmon-orange, red, or purple-black;

banner orbiculate, obovate, or oblong, emarginate;

wings ovate or oblong to obovate, conspicuously projected beyond distal bend of keel one directed upward to adopt function of banner;

keel incurved, beak hooked, tip of beak hidden by wings;

stamens 10, diadelphous;

anthers sub-basifixed;

ovary with nectary disc at base, style apically recurved and thickened, distal portion introrsely bearded, stigma terminal;

ovules 4–24.

legumes, patent or pendent, substipitate, valves plane or twisting, linear or oblong-falcate, dehiscent, non-septate, pilose, strigose, or hirsute.

pendent, oblong-falcate, 1.6–2.5 × 2.7–3 cm, valves not twisting at dehiscence.

4 or 5, oblong, 2.9–3 × 2–2.2 mm.

2–20, oblong or reniform;

hilum not centric, oblong or ovate.

= 11.