Flora of North America species comparison

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

prickles absent.

annual, climbing, branched, 2–3 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.

evenly distributed, proximalmost reduced to bracts;

petiole shorter than blade;

tendrils numerous, long, functional;

blade dark green, triangular, ovate, or slightly hastate, 2.5–8.5 × 4–7.5 cm, membranous, glabrous and glaucous abaxially, base truncate, cordate, or hastate, lobes rounded;

margins entire;

apex cuspidate.

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

peduncle to 12+ cm, short.

axillary to leaves, staminate to 20-flowered, pistillate few–40-flowered, moderately dense, subspherical;

peduncle of staminate umbel ± equaling subtending leaf, pistillate to 13.5 cm.

perianth greenish;

tepals 35–45 mm;

anthers equaling or shorter than filaments;

ovules (1–)2 per locule;

pedicel 0.5–1.5 cm.

perianth light green;

tepals 1.5–2 mm;

anthers slightly shorter than to equaling filaments;

ovules (1–)2 per locule;

pedicel thin, ca. 1.5 cm.

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

blue, ovoid, 6–8 mm.

= 26.