Flora of North America species comparison

erect or climbing, slender, 3–10 dm.

6–10 cm;

tendrils branched;

stipules much smaller than leaflets, semisagittate, with nectariferous patch abaxially;

leaflets 8–16, blades ovate or elliptic to lanceolate, 20–35 × 5–15 mm, apex obtuse to truncate-emarginate, abaxial surface sparsely pubescent, adaxial glabrous.

2–7-flowered, to 1 cm, shorter than subtending leaf rachis.

8–15 mm;

calyx base symmetric, lobes equal, shorter than tube;

corolla blue-violet and white, banner oblong, blade equal to claw, glabrous;

style compressed abaxially, pubescent apically, tufted abaxially.

black, elliptic, 20–35 × 5–8 mm, tip up-curved, glabrate;

stipe to 2 mm.

3–6, yellowish, reddish, gray or greenish gray with blackish spots or entirely black, globose, 3–4 mm diam.;

hilum encircling 1/2–3/4 circumference of seed.

= 12, 14.