Flora of North America species comparison

erect, stout, 5–20 dm.

1–7 cm;

tendrils absent;

stipules foliose, approaching leaflets in size, broadly semisagittate, with nectariferous patch abaxially;

leaflets 2–6, blades elliptic to ovate-lanceolate, 40–100 × 10–30 mm, apex obtuse, surfaces glabrous.

2–4-flowered, to 1 cm, much shorter than subtending leaf rachis.

20–30 mm;

calyx base symmetric, lobes unequal, longer than tube;

corolla white with purple mottling, banner stenonychioid, blade longer than claw, glabrous;

style compressed abaxially, pubescent apically, tufted abaxially.

dark brown to black, linear, 80–200 × 10–30 mm, oblique-tipped, sparsely pubescent;

stipe 1–2 mm.

2–4, purplish, greenish, or black, sometimes spotted gray, globose and 7–9 mm diam., or strongly compressed and 12–35 mm diam.;

hilum large, terminal, blackish, encircling 1/6–1/5 circumference of seed.

= 12, 14.