Flora of North America species comparison

trailing to climbing, strigose to pilose, glabrescent, hairs not uncinate.

alternate, odd-pinnate;

stipules present, caducous;

petiolate, petiole longer than rachis, both canaliculate;

leaflets 3, stipels present, often caducous, blade margins entire, surfaces glabrous or glabrate.

50–60+-flowered, axillary, pseudoracemes, floral nodes relatively conspicuous, glandular;

bracts present, often caducous, bracteoles early caducous, proximal to calyx, sometimes subpeltate.

mostly shorter than calyx tube.

papilionaceous;

calyx campanulate, lobes 5;

corolla greenish yellow to purple, glabrous;

banner usually longer than wings and keel, with 2 prominent appendages on inner face;

wing blades oblong, not projected beyond distal bend of keel;

keel petals connate along upper margin, not forming gibbosity or hump, incurved, and beaked;

stamens 10, diadelphous;

anthers basifixed, pollen tricolporate;

ovary oblong, nectary disc at base;

style slightly curved, distally bearded;

stigma terminal or subterminal.

legumes, stipitate, terete or subcylindric, widely oblong, leathery, with rostrate, curved beak, slightly compressed between seeds, dehiscent, glabrous or puberulent;

endocarp white-spongy.

2 or 3[–6], spherical [oblong to reniform or spherical-prismatic];

hilum linear-oblong, circumlinear, elongated 1/2 to nearly entire length of seed.

, perennial, unarmed.

= 11.