Rhizome far-creeping, branching; stems slender, up to ± 3 m. tall, sparingly branched. Petioles up to 10 cm. long. Lamina membr., glab. or nearly so, ± 5-10 × 4-7 cm., oblong-sagittate to hastate, acute or acuminate; cordate at base, sinus deep and narrow; lobes rounded to truncate. Peduncles long, us. narrowly winged; bracts large, ovate to ovate-lanceolate, enclosing subequal ovate-lanceolate sepals. Corolla ± 4-8 cm. diam., white or pink. Ovary incompletely 2-loculed; capsule c. 12 mm. diam., glab., apiculate. Seeds smooth.

2n = 22

Rhizomes extensive. Stems glabrous or puberulent at first. Petioles 1.5-8 cm long, generally puberulent. Lamina 3-14-(17) × 2.5-9-(11) cm, usually triangular- or ovate-sagittate, glabrous or puberulent near base; sinus deep and rounded, usually with diverging sides; basal lobes usually rounded or obtuse, rarely acute, sometimes with small subsidiary lobule; apex acute to short-acuminate. Fls solitary; peduncles 3-12 cm long, puberulent or glabrous, ridged or very narrowly winged. Bracts 1.25-3 × 1-1.5 cm, broad-ovate, not imbricate or only slightly so; base rounded or cordate; apex usually obtuse and mucronate. Sepals 12-15 mm long, lanceolate-ovate. Corolla (3)-5-6-(7) cm long; limb 4-6 cm diam., usually pink with white mid-petaline bands, rarely all white. Stamens 2-2.5 cm long; filaments hairy in lower 1/2. Ovary 1-locular. Style > stamens. Capsules c. 1 cm long, subglobose. Seed ± triangular-ovoid with rounded outer surface and ± flat on inner faces, dark brown to almost black.