Climber to 7 m. Tubers incompletely known, probably annually replaced, slender, to c. 5 mm in diam., spreading and branching, with cylindric to clavate thickened apices. Indumentum present on all parts of inflorescence except male flower inner tepals, absent elsewhere, hairs simple, 0.1–0.2 mm long. Stems 2–5 mm in diam., twining to the left, with a few prickles towards base, unarmed or almost so on distal stems, terete with shallow longitudinal ridges. Leaves 3-foliolate, sometimes simple on reproductive shoots, alternate, chartaceous, leaflets 3-veined, margins entire, terminal leaflet blades obovate, outer vein pair diminishing towards apex and not visible in the apical third, base acute to cuneate, apex acuminate; lateral leaflet blades ovate to obovate, usually asymmetric, base acute, apices acute to acuminate; petioles 3.5–7.5 cm long, sometimes angled and prickly; cataphylls 14–16 by 10–11 mm, ovate; bulbils sometimes present, 1.5–5 mm in diam., globose to ovoid; lateral nodal organs absent. Inflorescences/partial inflorescences racemose, pendent, tepals inserted on a small, shallowly saucer-shaped torus, free; male inflorescences compound, 1–2 per axil; partial inflorescences 1–2 per node, peduncles 2.5–7 mm long, axes 1.2–3.2 cm long; female inflorescences simple, 1–2 per axil. Male flowers on pedicels 0.7–0.9 mm long, tepals thinly chartaceous, outer 2.0–2.5 by 0.8–1.1 mm, narrowly ovate to ovate; inner 1.8–2.1 by 0.8–1.2 mm, narrowly obovate to obovate; stamens 3, apically incurved so that basifixed anthers are held almost pendent; staminodes 3. Capsules 17–29 by 10–15 mm. Mature seeds not seen, immature seeds 5.5–7 by 4–5 mm, ovoid to lenticular, wing extending from seed base, 7–11 by 3–6 mm, oblong.