Herbaceous vines, 2-3 m long. Stem angular, glabrous. Petiole 1.5-4 cm, with 2 tuberculate glands near base; leaf blade suborbicular to broadly orbicular, 3.5-5.5 × 3-6 cm, leathery, abaxially with 4-6 nectaries, base rounded or subcordate, margin entire, apex truncate, sometimes slightly acute. Inflorescences sessile, 2-8-flowered, glabrescent. Pedicel 1-2.5 cm. Flowers greenish yellow, 2-2.5 cm in diam.; hypanthium ca. 5 mm wide. Sepals green, 8-10 × 2-3 mm. Petals 7-8 × 1-2 mm. Coronal filaments in 2 filamentous series; outer series 6-8 mm, center brown, apices whitish; inner series ca. 4 mm, yellow-green, apices brown and capitate; operculum incurved, green, plicate, 1-2 mm tall, membranous; disk greenish brown, ca. 0.3 mm high; androgynophore brown mottled, 4.5-5 mm tall. Stamens 5; filaments 4-5 mm, free. Ovary sessile on androgynophore, subglobose, 1.5-2 × ca. 1.5 mm, pubescent; styles 3, free, 4-5 mm. Fruit blue at maturity, globose, 1.2-1.5 cm in diam., glabrous. Fl. Jun-Jul, fr. Aug-Oct.
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