Flora of North America species comparison

erect, stout, 3–7 dm.

sprawling or climbing, slender, 5–15 dm.

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.

4–8 cm;

tendrils simple;

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

leaflets (2 or)4(or 6), blades narrowly oblong to linear, 30–50 × 3–6 mm, apex obtuse, surfaces glabrous.

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

5–10-flowered, 3–15 cm, longer than subtending leaf rachis.

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.

8–12 mm;

calyx base symmetric, lobes equal, shorter than or equal to tube;

corolla blue or lavender and white, banner pandurate, blade equal to claw, glabrous;

style compressed adaxially, pubescent apically.

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

stipe absent.

brown, oblong, 40–45 × 7–8 mm, oblique-tipped, glabrous;

stipe 1–2 mm.

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

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

8–12, purplish black, compressed-globose, 3–3.5 mm diam.;

hilum encircling 2/3 circumference of seed.

= 14.