Flora of North America species comparison

erect, trailing, or climbing, slender to stout, to 20 dm.

erect, stout, 3–7 dm.

2–8 cm;

tendrils simple or branched;

stipules much smaller than leaflets, semisagittate, without nectariferous patch;

leaflets 8–18, blades ovate or elliptic to linear, 3–44 × 1–19 mm, apex obtuse to truncate-emarginate, or apiculate, surfaces glabrous or finely pubescent.

3–8 cm;

tendrils simple on proximal leaves, branched on distal leaves;

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

leaflets 2–6, blades obovate to elliptic, 30–60 × 20–35 mm, margins rarely serrate, apex obtuse, surfaces sparsely pubescent.

3–9-flowered, 2–8 cm, shorter than or equal to subtending leaf rachis.

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

12–25 mm;

calyx base symmetric, lobes subequal, shorter than tube;

corolla usually bluish purple, rarely white, banner oblong, blade equal to claw, glabrous;

style compressed abaxially, pubescent apically, tufted abaxially.

15–30 mm;

calyx base symmetric, lobes unequal, to 2 times as long as tube;

corolla purple, drying black, banner stenonychioid, blade subequal to claw, glabrous;

style compressed abaxially, pubescent apically, tufted abaxially.

tawny to brown, oblong, 25–39 × 5–9 mm, oblique-tipped, glabrous or pubescent;

stipe to 4–5 mm.

black, linear, 30–70 × 10–15 mm, oblique-tipped, glabrous, sutures with pustulate-based bristles;

stipe absent.

number not known, olive-brown to deep violet-brown, subglobose, 3–4 mm diam.;

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

4–6, purplish violet to black, subglobose or compressed-globose, 5–6 mm diam.;

hilum whitish, short, oblong, encircling 1/8 circumference of seed.

= 14.