Flora of North America species comparison

erect or scandent, young growth densely strigose or villous or glabrescent, peduncles and pedicels eglandular.

alternate, odd-pinnate or unifoliolate;

stipules present, caducous;

petiolate;

leaflets 1–5[+], alternate, stipels absent, blade margins entire, surfaces glabrous or pubescent.

unifoliolate;

stipules deltate-ovate, 1–2 × 1 mm, apex acute;

petiole 0.5–1.5 cm, glabrous or puberulent;

petiolules 2–3 mm, glabrous or pilose;

leaflet blades ovate to ovate-elliptic, 40–80 × 20–40 mm, base cordate to rounded, apex usually acute, sometimes acuminate or obtuse, surfaces lustrous, glabrous or lightly appressed-pubescent, hairs minute.

10–50-flowered, axillary [lateral or terminal], racemes, panicles, or corymbs;

bracts present;

bracteoles paired proximal to calyx.

corymbose-paniculate, axes pilose becoming glabrate;

bracts subpersistent, blade deltate, 1–2 × 1 mm, apex acute to obtuse;

bracteoles caducous, blade elliptic-ovate, to 1 mm, apex acute to obtuse.

1.5–2 mm.

papilionaceous;

calyx campanulate, lobes 5;

corolla usually white, creamy white, or yellowish, sometimes pinkish [purple], glabrous;

stamens 9 or 10, monadelphous or diadelphous [triadelphous];

anthers basifixed, relatively small, dehiscing apically;

style glabrous;

stigma terminal, small.

calyx 4 mm, base slightly narrowed, often subsericeous, sometimes glabrate, abaxial lobe 1 mm longer than lateral lobes, adaxial lobes connate nearly to apex, longer than lateral;

corolla usually white, sometimes pinkish, 8–10 mm;

stamens 10, monadelphous;

filaments alternately long and short;

pistil glabrous.

legumes, stalk present, compressed, straight, compressed, narrowly ellipsoid to oblong or subglobose to subreniform, indehiscent, often winged (samaroid), glabrous or pubescent.

stalk 3 mm;

ellipsoid to oblong, 15–50 × 10 mm, base cuneate to rounded, apex usually obtuse, surface lustrous, glabrous.

1–4[–6], reniform;

hilum lateral.

1–4.

= 10.