Flora of North America species comparison

annual, climbing, branching, to 2.5 m, herbaceous, glabrous;

prickles absent.

annual, immature erect, older climbing, 1–2 m, occasionally branching, herbaceous, glabrous;

prickles absent.

evenly distributed;

petiole ± equaling blade;

tendrils numerous, long, functional;

blade lustrous, dark green abaxially, narrowly to broadly ovate, 8–16 × 3.5–9 cm, often with minute, whitish pubescence abaxially mostly on veins, with transparent trichomes, base cordate, margins entire, convex, apex long-acuminate;

leaves on branches with oblong, smaller blade.

numerous, evenly distributed;

tendrils numerous, long, functional;

blade deltate-ovate, pandurate, or cordate-ovate, the larger hastate, thin, 5–12 × 2–5 cm, coriaceous, glabrous, glaucous abaxially, base truncate to subcordate;

apex round to cuspidate.

numerous, axillary to leaves, 10–35-flowered, globose;

peduncle equaling or shorter than subtending leaf.

solitary or in sets of 3, axillary to leaves, 10–35-flowered, loose, subglobose;

peduncle shorter than to 1.5 as long as subtending leaf.

perianth greenish;

tepals 3.5–5 mm;

anthers shorter than filaments, ovules (1–)2 per locule;

pedicel 0.5–2.2 cm.

perianth greenish;

tepals 1.5–2.5 mm;

anthers equaling or slightly larger than filaments;

ovules (1–)2 per locule;

pedicel 0.3–1.5 cm.

black, subglobose, 8–10 mm, not glaucous.

blue to black, subglobose, 4–6 mm, glaucous.

= 26.

= 30.