Herbaceous climber or scrambler 1.5–3 m. long, with swollen roots; stems slender, ribbed or ± polygonal with wings, ± glabrous; tendrils bifid, glabrous.. Leaves oblong-lanceolate to oblong-ovate, 4.5–14 cm. long, 2–5.5 cm. wide, acuminate at the apex, rounded to broadly cuneate at the base, finely dentate, glabrous except for the midrib beneath, ± thin; petiole 0.3–3 cm. long, deeply channelled and ± winged, glabrous except sometimes at apex; stipules oblong-triangular, 2–3.5 mm., deeply cordate at base, glabrous.. Inflorescences small, 0.5–1.5 cm. long, becoming 2.5 cm. long in fruit, consisting of cymes of umbel-like few-flowered cymules; peduncle 0–5 mm. long; bracts and bracteoles triangular, ± 0.5 mm. long and wide, acute, glabrous; pedicels 1–2 mm. long, ± thickened above, glabrous.. Calyx ± 1 mm. long, glabrous.. Corolla orange-brown or yellowish, ovoid-globose; petals triangular, 1.2–1.5 mm. long, glabrous.. Ovary glabrous.. Fruits crimson to dark reddish purple, ovoid, 6–8 mm. long, 4–5 mm. wide, glabrous.. Seeds ovoid-reniform, 5–6 mm. long, 3–3.5 mm. wide, ± 3 mm. thick, with prominent basal projection; median, lateral and radial crests well marked and raised, the actual seed surface smooth.
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