Flora of North America species comparison

twining, usually prickly, sometimes rooting at nodes.

twining.

blades broadly ovate to triangular or 3–5-lobed, 50–150 × 50–150 mm, base cordate, surfaces usually glabrous, rarely hairy.

blades usually cordate, sometimes ovate, sagittate, or triangular, 20–140 mm, base ± cordate, lobes rounded or 1–2-pointed, surfaces glabrous or proximally pilose.

glabrous.

glabrous.

nocturnal;

sepals ovate, 7–15 mm, ± coriaceous, apex acute, outers each with midrib extending as ± corniform appendage;

corolla white, throat green-banded inside, salverform, 70–150 mm.

diurnal;

sepals chartaceous, outers oblong to elliptic, 3–3.5 mm, apex obtuse to truncate, each with ± terminal corniform appendage 2.5–6 mm, inners oblong, 4.5–5.7 mm, chartaceous, apex obtuse to truncate, each with ± terminal, corniform appendage 2–5.5 mm;

corolla usually red or red and yellow, sometimes white (in cultivars), salverform, 20–25 mm.

20–30 mm.

= 30.

= 28.