Flora of North America species comparison

usually twining or prostrate, rarely erect, densely strigose or hirsute, glabrescent; arising from subterranean, lignescent to woody taproots.

alternate, odd-pinnate;

stipules present, persistent, striate;

petiolate;

leaflets (1–)3(or 5), stipels persistent or caducous, sometimes absent, blade margins entire, often revolute, apex mucronate, surfaces usually pubescent, sometimes glabrous adaxially.

stipules striate, oblong-ovate, oblong, linear-oblong, linear-lanceolate, lanceolate, or triangular, 1.1–6.7 × (0.2–)0.3–2.8 mm, hirsutulous, pilose, strigose, or glabrate;

petiole striate, canaliculate, 1–8 cm, hirsute or strigose to glabrescent;

rachis canaliculate, corrugate, 7–17 mm, hirsute or strigose;

stipels not caducous, linear, 0.3–0.5 mm, strigose, glabrescent, or glabrous;

leaflets 3(or 5), green, blades usually linear-oblong, oblong, oblong-elliptic, lanceolate, ovate, elliptic, or ovate-oblong, rarely orbiculate or obovate, 0.4–17 × 0.1–1.6 cm, base cuneate, obtuse, rounded, or attenuate, sometimes subcordate, apex usually acute or obtuse, rarely acuminate, venation conspicuous abaxially, conspicuous or slightly conspicuous adaxially, surfaces abaxially slightly to densely strigose, glabrescent, adaxially strigose.

1–6-flowered, axillary, racemes, fasciculate (usually with both chasmogamous and cleistogamous flowers), or with solitary flowers;

bracts present, subtending peduncles and pedicels, persistent, usually relatively small;

bracteoles persistent, paired or alternate proximal to calyx.

with 1–3(or 4) chasmogamous flowers, usually together with 1 or 2 cleistogamous flowers, 1.8–4.9 cm.

0.5–4.8(–18) mm, strigose, pilose, hirsutulous, pilosulous, or strigulose;

bracts striate, lanceolate, linear-lanceolate, linear-oblong, or oblong, 2–7.8 × 0.4–1.3 mm, strigose or densely hirsute, glabrescent.

2–22 mm, densely to slightly strigose or pilose;

bracts striate, linear, 1.3–4.5 mm, strigose, strigulose, hirsute, or glabrescent;

bracteoles linear, (0.7–)1.2–3.3(–4.6) mm, strigose, strigulose, hirsutulous, or glabrescent.

papilionaceous;

calyx tubular [cylindric], lobes 5, sometimes adaxial pair fused, adaxial gibbous at base;

corolla purple, purple-pink, purplish blue, blue, pink, magenta, red-purple, violet, lilac, or lavender, glabrous;

banner base auriculate, short-clawed;

wings longer than keel, long-clawed, auriculate, distally spreading;

keel slightly incurved, long-clawed;

stamens 10, diadelphous;

anthers sub-basifixed, dehiscing laterally, pollen tricolporate;

ovary usually stipitate, pubescent, nectary disc at base;

style filiform, ± incurved, glabrous, stigma terminal with a crown of short cilia.

calyx green to purple, 7.5–16 × 2.1–5.9 mm, strigose, hirsute, pilose, or glabrescent, lobes triangular, strigose, (1.6–)2.2–4.5(–5.2) × 1.1–2.3(–3.1) mm, adaxial lobe deltate, 2.5–4.8 × 2–3.6 mm, rarely divided;

corolla usually purple, pink-purple, pink, or bluish, rarely magenta;

banner obovate, 17–33 × 7.6–19 mm, claw slightly lobulate, apex obcordate, rarely emarginate;

wings obovate-oblong or obovate, 14–30 × 2.5–7 mm, claw 6.8–13 mm;

keel oblong or obovate, 11–18 × 2.1–3.4 mm, claw 6.8–12 mm;

staminal tube 10.5–18.5 × 1.6–3.5 mm, free filaments 0.5–2.6 mm, vexillary filament 9.5–17 mm;

anthers elliptic, oblong, or oblong-elliptic, 0.4–0.7 × 0.2–0.4(–0.5) mm;

ovary linear-oblong, (8–)11–19 × 0.4–0.8 mm, sericeous to densely strigose;

style 1.5–3.8 mm;

stigma 0.2–0.3 mm diam.

legumes, sessile or stipitate, compressed or slightly turgid, linear to falcate or strongly curved, dehiscent, cleistogamous fruits smaller, pubescent.

(chasmogamous) linear to slightly falcate, 5 × 0.4 cm, valves densely appressed-pilose or hirsute;

stipe 0 mm.;

legumes (cleistogamous) straight to slightly or strongly curved, (1.4–)1.8–4.6 × 0.2–0.4 cm, valves densely strigose or pilose;

stipe (0–)0.8–1 mm.

2–10(or 11), compressed, usually oblong, orbicular, or subquadrate, rarely rhombic or elliptic;

testa smooth, hilum lateral, ovate, rim-aril and epihilum conspicuous.

(chasmogamous) 10, brown, oblong or subquadrangular, 5 mm.;

seeds (cleistogamous) (2–)4–10, brown, with darker patterns, oblong, orbicular, or subquadrate, 2–4.8 mm.

= 11.

= 44.