Flora of North America species comparison

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

prickles absent.

annual, erect, 0.2–0.6 m, herbaceous, glabrous, glaucous abaxially;

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.

few, approximate distally;

tendrils absent;

blade ovate, 6–15 × 1.5–8 cm; glabrous and glaucous abaxially, base cordate, margins entire, apex acute to acuminate.

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

1–few, proximalmost axillary to leaves or bracts, few-flowered, open;

peduncle 5–10 cm.

perianth greenish;

tepals 3–3.5 mm;

anthers shorter than filaments;

ovules (1–)2 per locule.

perianth greenish;

tepals 2.5–3.5 mm;

anthers longer than filaments;

ovules (1–)2 per locule;

pedicel slender, ca. 1 cm.

globose, 8–10 mm diam., glaucous.

black to bluish black, globose, ca. 8 mm diam., not glaucous.

= 26.

= 26.