Flora of North America species comparison

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

prickles absent.

annual, climbing, branching, to 2.5 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.

petiole thin, 1–6 cm;

tendrils numerous, long, functional;

blade oblong-ovate, ovate, or round, 4.5–12 × 3–9 cm, glabrous abaxially, base cordate to truncate, margins entire, apex obtuse to acute;

proximal cauline leaves narrower and smaller.

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

many, axillary to leaves, 20–100+-flowered, globose;

peduncle to 30 cm, progressively shorter distally.

perianth greenish;

tepals 3–3.5 mm;

anthers shorter than filaments;

ovules (1–)2 per locule.

perianth greenish, carrion-scented;

tepals 3.5–4.5 mm;

anthers much shorter than filaments;

ovules (1–)2 per locule;

pedicel 0.5–2 cm.

globose, 8–10 mm diam., glaucous.

blue, subglobose, ca. 10 mm diam., glaucous.

.

= 26.

= 26.