Monoecious vines; stems glabrous. Leaves 3-to 5-f oliolate, 3-to 7-lobate, or sometimes simple, suborbicular, the leaflets or the segments 8-10 cm long, 2-4 cm wide, lanceolate or oblong, the apex acute to obtuse, the base asymmetrical and often auriculate, the margin remotely few toothed, undulate, or entire, sub-membranaceous to chartaceous, the upper surface minutely white pustulate, the lower surface glabrate; petioles 1-3 cm long, glabrous; tendrils simple, slender, glabrous. Staminate flowers axillary in subcapitate clusters at the end of long pedunculate racemes; peduncle 12-20 cm long, glabrous; pedicels 5-16 mm long, glabrous; calyx flask-shaped, 6-8 mm long, glabrous, the lobes triangular, 1-2 mm long, erect, glabrate; corolla orange, the lobes oblong, obtuse, 1.0-1.5 cm long, both the surfaces papillose; anthers oblong, 5-6 mm long, appendix ca. 1 mm long, glabrous. Pistillate flowers solitary or in pairs in the axils of the leaves; calyx and corolla as in the staminate flowers; ovary oblong, ca. 1 cm long, gla-brous; peduncle 3-S cm long. Fruits green with lighter stripes, ovoid oblong, 3-4 cm long, 1.5-2.0 cm in diameter, the base rounded, the apex rostrate, the flowers often persisting; seeds oblong ovate, gray, ca. 6 mm long, ca. 3 mm wide, smooth.
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