Flora of North America species comparison

annual, erect to ascending, branched, 2–2.5 m, herbaceous, glabrous;

prickles absent.

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

prickles absent.

evenly distributed, proximalmost smaller, narrower;

petiole 1.5–9 cm, shorter than blade;

tendrils numerous, long, functional;

blade not lustrous, pale green abaxially, ovate to round, 4–8 × 3–6 cm, not glaucous, pubescent abaxially, with transparent trichomes, base cordate, margins entire, convex, apex acuminate to rounded and cuspidate.

petiole thin, 1–6 cm;

tendrils numerous, long, functional;

blade oblong-ovate, ovate, or round, 4.5–12 × 3–9 cm, glabrous abaxially, base cordate to truncate, margins entire, apex obtuse to acute;

proximal cauline leaves narrower and smaller.

many, axillary to leaves, to 35-flowered, dense, globose;

peduncle to 12+ cm, short.

many, axillary to leaves, 20–100+-flowered, globose;

peduncle to 30 cm, progressively shorter distally.

perianth greenish;

tepals 35–45 mm;

anthers equaling or shorter than filaments;

ovules (1–)2 per locule;

pedicel 0.5–1.5 cm.

perianth greenish, carrion-scented;

tepals 3.5–4.5 mm;

anthers much shorter than filaments;

ovules (1–)2 per locule;

pedicel 0.5–2 cm.

bluish black to black, subglobose, 8–10 mm, glaucous.

blue, subglobose, ca. 10 mm diam., glaucous.

.

= 26.

= 26.