Flora of North America species comparison

glabrous.

usually puberulent or pubescent, sometimes glabrescent, rarely tomentellous or ± villous.

twining-climbing.

decumbent, procumbent, or twining-climbing, to 400 cm.

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

blade ± triangular, 15–40 mm, base usually lobed, lobes rounded or 1–2-pointed, basal sinus quadrate, rounded and ± parallel-sided, or V-shaped, base sometimes ± cuneate.

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

(1–)3–12(–15) mm distant from sepals, lanceolate, linear, linear-oblong, oblanceolate, or narrowly to broadly triangular, 4–22(–30) × 1–4(–7) mm, margins entire or proximally lobed or toothed.

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 9–15 mm;

corolla white or cream, (20–)25–48 mm.