Flora of North America species comparison

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

prickles absent.

annual, erect, unbranched, 0.5–1 m, herbaceous;

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.

numerous, evenly distributed, larger distally;

petiole thin, equaling or longer than blade;

tendrils distal, few, short;

blade narrowly ovate, pubescent and not glaucous abaxially, base rounded to truncate, margins convex, apex acute to acuminate.

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

peduncle to 12+ cm, short.

3–10, axillary to leaves and bracts, 10–50-flowered, semiglobose;

proximalmost peduncle longer than distalmost.

perianth greenish;

tepals 35–45 mm;

anthers equaling or shorter than filaments;

ovules (1–)2 per locule;

pedicel 0.5–1.5 cm.

tepals 3.5–4.5 mm;

anthers usually shorter than filaments;

ovules (1–)2 per locule.

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

blue to black, globose.

= 26.

= 26.