Woody vines, ca. 8 m long. Stem terete, sparsely white pubescent, striate. Petiole 3-5 cm, pubescent, with 2 peg-shaped glands in lower 1/3 part; leaf blade 3-11 × 3-10 cm, membranous, pubescent, often with 2 or 3 pairs of glands near apex of midvein on abaxial surface, apex truncate, (2 or)3-lobed; lobes 5-10 mm, base broadly rounded to cordate, apex acute to acuminate. Inflorescences (sub)sessile, 5-15-flowered, pubescent. Pedicel 2.5-3 cm, pubescent. Flowers whitish, 3-4 cm in diam.; hypanthium 9-12 mm wide. Sepals light purple, 1-2 cm × ca. 5 mm, glabrous. Petals 1-1.5 cm × ca. 5 mm. Coronal filaments in a single series, 6-8 mm; operculum plicate, 2.5-3 mm tall, membranous; disk ca. 0.5 mm high; androgynophore 7-10 mm tall. Stamens 5; filaments 6-10 mm, basally fused for 1.5-3(-4) mm; anthers 3.5-5 × 2-3 mm. Ovary sessile on androgynophore, ellipsoid, glabrous; styles 3, free, 4-5 mm. Fruit blue at maturity, subglobose to ellipsoid, ca. 2 cm in diam., glabrous. Fl. Mar-Apr, fr. May-Jul.
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