Stems 0.2-2 m. Leaves: small leaf of pair often not equaling petiole of larger leaf; petiole 8-45 mm; blade ovate, ovate-deltate, or elliptic-ovate, 9-50 × 3-45 mm, base slightly to strongly oblique, truncate to cordate, margins sinuate and undulate, apex usually rounded, sometimes obtuse or acute, surfaces often red-punctate. Inflorescences: peduncle 1-9 mm at anthesis, rapidly elongating and curving downward as perianth wilts, ultimately 10-30 cm. Perianth magenta [rarely yellow], 10-30[-50] × 9-30[-45] mm. Fruits brownish or whitish, 9-13 × 6-9 mm.
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