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Climber or creeper to 6 m., perennial, glabrous, glabrescent or pubescent to various degrees; stem ± angular, corky when older.. Leaf-blades entire or usually 3-lobed up to four-fifths, subcircular to ovate or oblong in outline, base rounded or cordate, 4–10 by 4–14 cm., 3–5-nerved from base, membranous or subcoriaceous; lobes triangular to lanceolate, top acute to acuminate; margin entire; petiole 0.5–4 cm., with 2 small obconical or wart-like glands at about the middle; blade-glands usually absent.. Stipules linear, 5–8 mm.. Inflorescences sessile, 1–2-flowered, with a central tendril, simple, 3–12 cm.; pedicels 1–2 cm., jointed about half-way; bracts setaceous, caducous, ± 1 mm.. Flowers 1–2 cm. in diameter, pale greenish yellow.. Hypanthium saucer-shaped, 3–5 mm. wide; sepals ovate to lanceolate, subobtuse, 5–10 mm.. Petals absent.. Corona threads in 2 series, 2–6 mm.; operculum (inner corona) plicate, minutely fimbriate; disk annular.. Androgynophore 2–4 mm... Filaments ± subulate, 2–3 mm.; anthers 1–2 mm.. Ovary subglobose-ellipsoid, 1–2 mm., glabrous; styles 2–3 mm.. Fruit a berry, subglobose, 0.8–1.5 cm. in diameter, glabrous, purple-blackish.. Seeds several–many, subovoid, 3–4 mm. long.
Herbaceous vines, 1-4(-10) m long. Stem white or whitish gray, triangular, slender, striate. Petiole 2-4 cm, white strigose, with 2 glands at middle or slightly above; leaf blade 5-5.5(-8) × 5-6(-11) cm, abaxially gray-green, sparsely villous, base cordate, 3-lobed, lobes ovate, apex acute, mucronate. Flowers axillary, solitary or in pairs, light green or white, 1.5-2.5 cm in diam. Sepals 5-8 mm, oblong or lanceolate, outside hispidulous. Petals absent. Corona in 2 series, filamentous, outer series 3-7 mm, inner series ca. 1 mm; operculum plicate, 1-2 mm high; disk 0.5-1 mm; androgynophore 2-4 mm tall. Filaments flat, 1.5-4 mm, free; anthers oblong, 2-3 mm. Ovary subglobose, glabrous; styles 3, almost threadlike, 7-8 mm; stigma capitate. Berry turning bluish black at maturity, subglobose, 1-1.2 cm in diam. Fl. Aug-Sep, fr. Sep-Nov. 2n = 24.
Slender climbers, glabrous to densely puberulent, the base of the stems more or less corky. Leaves petiolate, simple, basifixed, extremely variable, usually definitely 3-lobed, the central lobe longer, rarely almost entire 3-12 cm. long, 2-9 cm. broad, not ocellate or very inconspicuously so; petioles 1-2 cm. long, inconspicuously glandular near the juncture with the leaf blade; stipules inconspicuous and linear. Inflorescences usually paired, each bearing a single small, greenish flower; peduncles filiform, 1-2 cm. long, jointed almost directly beneath the flower; bracts very minute. Flowers about 1-3 cm. in diameter; sepals lanceolate, 0.5-1.5 cm. long, not corniculate; petals absent; filaments of the corona in 2 series, the outer about half as long as the sepals. Fruit globose, deep purple, 0.5-1.5 cm. in diameter.
A climbing vine. It has wiry stems. The older stems have pale corky bark. The tendrils are in the axils of the leaves. The leaves can have 3 lobes. The central lobe is usually the largest. The flowers are small and yellow. They are in the axils of leaves. They are 8-30 mm across. The flowers have 5 petals. The berries are 1 cm across. There are several seeds inside.
Flowers small, 1-1½ cm ø, apetalous, pale greenish; fruit a purple-black berry, 1-1¼ cm ø.
