Flora of North America species comparison

glabrous.

tomentose to villous.

twining-climbing.

ascending, decumbent, or procumbent, to 60(–100) cm.

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

not in rosettes;

blade usually broadly to narrowly triangular, sometimes ± reniform, 30–60 × 30–90 mm, base lobed, lobes 1–3-pointed, margins not notably undulate, apex acuminate, acute, emarginate, or obtuse.

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

usually immediately subtending sepals and lanceolate to broadly ovate, rarely to 7 mm distant from sepals and narrowly triangular to subreniform, (7–)10–18(–20) × (5–)7–14(–15) mm, lengths usually equal to or longer than sepals, margins entire, 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 9–13(–15) mm, densely hairy;

corolla white, (20–)26–38(–45) mm.