Flora of North America species comparison

glabrous.

glabrate or hairy, hairs minute, appressed or ascending.

twining-climbing.

trailing or weakly twining-climbing, to 100 cm.

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

blade ± triangular-hastate (daggerlike), 20–40 mm, middle lobe ± lance-linear, (1–)2–7(–9) mm wide, base lobed, lobes 1–2-pointed.

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

1–2 mm distant from sepals, linear, 5–16(–20) × 0.5–1.5 mm, proximally flat, 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 ovate to elliptic, 9–11 × 4–6 mm, apices obtuse-apiculate;

corolla white, 27–36 mm.