Herbaceous vines, 6-10 m long. Stem terete, glabrous, rarely glabrescent. Petiole 2-2.5 cm, with 2 peg-shaped glands in lower 1/3 part; leaf blade 4-6(-11) × (3.5-)6-13 cm, membranous, glabrous, rarely glabrescent, with 1(or 2) pairs of glands near apex of midvein on abaxial surface, base broadly rounded to subcordate, apex strongly truncate, 2(or 3)-lobed. Inflorescences (sub)sessile, glabrous or sparsely puberulous, 2-15-flowered. Pedicel 5-15 mm. Flowers white, (2-)2.5 cm in diam.; hypanthium 5-10 mm wide. Sepals purplish brown, 7-11 × 2-3 mm, glabrous. Petals whitish, 7-10 × 2-3 mm. Corona in a single series; filaments purple at base, white at apex, 3-6 mm; operculum white, plicate, ca. 2 mm tall, membranous; disk brown, 2-3 mm high; androgynophore 6-10 mm tall. Stamens 5; filaments (2.5-)3-6 mm, free; anthers 2-3(-4) × 1-1.5(-2) mm. Ovary sessile on androgynophore, ellipsoid, 2-3 mm, glabrous; styles 3, free, 3-5 mm. Fruit blue at maturity, subglobose, 2.5-3 cm in diam., glabrous. Fr. Jul.
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