Flora of North America species comparison

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

prickles absent.

annual, erect to leaning, with bladeless bracts proximally, leaves distally, 0.3–0.8 m, herbaceous;

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.

mostly distal (upper 1/2–2/3 of plant);

petiole thin, shorter than blade;

tendrils few and short or absent;

blade thin, broadly elliptic-ovate to subrotund, 9–12 × 5–9 cm, pubescent and not glaucous abaxially, base cordate to truncate, margins entire, convex, apex round to acuminate.

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

peduncle equaling or shorter than subtending leaf.

1–3, proximalmost axillary to bracts below leaves, to 25-flowered, hemispherical to globose.

perianth greenish;

tepals 3.5–5 mm;

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

pedicel 0.5–2.2 cm.

perianth green;

tepals 3.5–4 mm;

anthers ± equaling filaments;

ovules (1–)2 per locule;

pedicel 0.5–1.3 cm.

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

purplish black, globose, 9–11 mm, not glaucous.

= 26.

= 52.