Monoecious vines; stems puberulent to glabrate. Leaves simple, blade elliptic to cordate in outline, entire or 3-lobate to palmately divided, 5-15(-20) cm long, 3-15(-20) cm wide, the apex rounded to acute, the base cuneate to cordate, the margin remotely glandular denticulate, chartaceous to subcoriaceous, the upper surface white pustulate, scabrous pubescent, at least on the nerves near the base, the lower surface scabrous pubescent, sessile glands present near the base; petiole 1.5-6.0 cm long, slender, pubescent to glabrate; tendrils 2-branched below the middle. Staminate flowers axillary, racemose or paniculate, occasionally soli-tary, the rachis to 15 cm long, slender, pubescent to glabrate; pedicels 3-6 mm long, slender; calyx campanulate, ca. 5 mm long, obscurely nerved, pubescent, the lobes broadly triangular, ca. 1 mm long; corolla yellowish white or greenish white, the lobes ovate lanceolate, ca. 1 cm long, the outer surface pubescent, the inner surface tomentose, obscurely nerved; filaments ca. 4 mm long, slender, the anthers complicate, forming an irregular oblong head ca. 3 mm long; nectaries pouchlike on hypanthium wall near the base, a cuplike nectary disc present near the base of the hypanthium. Pistillate flowers disposed as in the staminate flowers; calyx and corolla as in staminate flowers; style ca. 6 mm long, the ovary ellipsoid, puberulent to glabrate, 4-6 mm long; nectaries as in the staminate flowers, cuplike nectary disc surrounding the base of the style column; staminodia absent. Fruits orange to red, ellipsoid to ovoid, 1.3-2.0 cm long, 0.8-1.0 cm in diameter, the surface smooth, glabrous; seeds 2-3, ellipsoid, ca. 8 mm long, ca. 5 mm wide, orangish brown, the testa roughened.
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