Flora of North America species comparison

glabrous.

glabrous.

twining-climbing.

erect, sometimes intertwined.

blade ± cordate, to 50–120 mm, base rounded or lobed, lobes rounded or 1-pointed, basal sinus ± quadrate to rounded.

blade usually linear to narrowly triangular, sometimes ovate, to 60 mm, base not lobed, or hastate-lobed and lobes ± linear, oblong, or triangular, 1-pointed.

immediately subtending sepals, lanceolate, to 30 × 15–35 mm, proximally saccate, margins strongly enfolding sepals, apex obtuse to truncate.

5–20(–50) mm distant from sepals, lanceolate to linear, 3–17 × 0.2–3 mm, margins entire or lobed.

sepals oval to ovate, 15–23 mm;

corolla white, sometimes pinkish-striped, rarely otherwise pink-tinged, 43–70[–88] mm;

stamens 23–40 mm;

anthers 4–6.5 mm.

sepals oblong-ovate, 8–11 mm;

corolla white or cream, sometimes pink-tinged, 28–36(–47) mm.