Flora of North America species comparison

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

prickles absent.

annual, climbing, branched, 2–3 m, herbaceous, glabrous;

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.

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.

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

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 3–3.5 mm;

anthers shorter than filaments;

ovules (1–)2 per locule.

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.

globose, 8–10 mm diam., glaucous.

blue, ovoid, 6–8 mm.

= 26.