Flora of North America species comparison

twining or trailing, strigose or hirsute, hairs not uncinate, [or glabrous].

alternate, odd-pinnate, pulvinate;

stipules present, not produced proximal to insertion;

petiolate;

leaflets 3, stipels present, blade margins entire [lobed], surfaces glabrous, puberulent, or pilose.

50-flowered, axillary, pseudoracemes, nodes swollen, glandular;

bracts and bracteoles present.

mostly shorter than calyx tube.

papilionaceous;

calyx broadly campanulate, lobes 4, lower lobe slightly longer than tube;

petals distinct;

corolla usually light pink to purple, sometimes white, becoming yellowish, wings with purple pattern;

wings obovate, conspicuously projected beyond distal bend of keel;

keel incurved to coiled, beak very tightly coiled distally, projected downward, tip not hidden by wings, not folded back distally;

stamens 10, diadelphous;

anthers basifixed, pollen tricolporate;

ovary glabrous or puberulent, nectary disc surrounding ovary, style with brush of hairs, stigma laterally extrorse (in anthesis).

legumes, sessile, broadly linear to falcate, valves thickened at margins with short, stiff hairs, beaked, dehiscent, strigose or pilose or glabrate.

[8 or]9–15, ovate to reniform, often D-shaped, testa smooth.

, perennial, herbaceous, unarmed;

taproot thick.

= 11.