Vine becoming woody, often climbing, with thick angulate to terete, striate stems, the pith interrupted by nodal diaphragms, the young branches densely floccose-tomentose, becoming glabrate, the nodes slightly swollen. Leaves char-taceous, rounded-ovate to orbicular, frequently with 3 shallow lobes, finely to coarsely dentate, rarely subentire except at the apex, lateral veins conspicuous beneath, ending at the apex of the marginal teeth, acute to short acuminate at the apex, shallowly to deeply cordate at the apex, 5-15 cm long, 4.5-12.5 cm broad, floccose-tomentose above when young becoming sparsely floccose-tomentose to glabrate with age, densely floccose-tomentose beneath, the tan to light ferrugineous tomentum close to lax, usually persistent. Inflorescences of well developed panicles, the peduncles 4-15 cm long, sparsely to densely floccose-tomentose. Flowers pale yellow to greenish-yellow, unisexual or bisexual, the calyx undulate, scarcely toothed, the pedicel 1.5-3 mm long, the corolla 1-1.5 mm long, the lobes oblong to oblong-obovate, the unisexual flowers with well developed stamens and an abortive pistil, the perfect flowers with short stamens, the hypogynous glands more or less united, the pistil 1-1.5 mm long, the ovary orbicular, the style short, ending with a shallowly bibbed stigma. Berries green becoming purplish-black with maturity, 4-6 mm in diam, orbicular, usually 2-seeded; seeds 3-4 mm long, pyriform, slightly curved, more or less stipitate.
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A vine. It climbs by mean of tendrils and can be 10-35 m long. The young vine has a dense covering. The stems can be 8 cm across. The leaves are simple and opposite. The leaf blades are 7-16 cm long by 7-13 cm wide. They are oval and have 3 lobes. The base is heart shaped. The flowers are in groups 6-12 cm long in the axils of leaves. The flowers are green. The fruit are 5-6 mm across.
Common in wet to dry forest or thickets, often in pine-oak forest, most plentiful at lower elevations but also extending to 1,700 metres.
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It is a tropical plant. In Central America it grows between 100-1,300 m altitude.