Flora of North America species comparison

annual, erect, 2–5 m, herbaceous, glabrous;

prickles absent.

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

prickles absent.

few, disposed distally or evenly distributed, subequal;

petiole shorter than blade;

tendrils absent or rudimentary;

blade oblong, oblong-ovate, or sometimes oval, 2.5–12 × 1.5–7.5 cm, not glaucous, puberulent abaxially, base rounded to slightly cordate, margins entire, apex broadly rounded to obtuse or abruptly pointed.

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.

1–3, proximalmost axillary to bracts, 5–12-flowered.

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

proximalmost peduncle longer than distalmost.

perianth greenish;

tepals 3–3.5 mm;

anthers shorter than filaments;

ovules (1–)2 per locule.

tepals 3.5–4.5 mm;

anthers usually shorter than filaments;

ovules (1–)2 per locule.

globose, 8–10 mm diam., glaucous.

blue to black, globose.

= 26.

= 26.