Climber to 5 m. Underground parts unknown. Indumentum absent. Stems1.5–3 mm in diam., (stem base unknown) twining to the left, annual, unarmed, terete. Leaves simple, alternate, sometimes 2 leaves produced on one side of the same node, blade narrowly ovate to ovate or ovate-deltoid, chartaceous to thinly so, 5–7-veined, margins entire, base subcordate to cordate, apex acute to acuminate; petioles 1.3–5.6 cm long; cataphylls, bulbils and lateral nodal organs absent. Inflorescences pendent, simple, tepals inserted on cupshaped torus c. 1/3rd length of tepals, free; male inflorescences racemose, 1(–2) per axil; peduncles 4–13 mm long, axes (2.1–) 4.2–12(–20) cm long; flowers 1.5–2.5 mm in diam. at anthesis, pedicels 0.6–0.8 mm long; female inflorescences spicate, 1 per axil. Male flowers with outer tepals 1.6–2 by 0.8–1.2 mm, lanceolate to narrowly ovate, inner tepals 1.5–1.7 by 0.9–1.2 mm, narrowly obovate, stamens 6, filaments erect to apically incurved. Capsules usually 1–3 per infructescence, 18–21 by 36–40 mm. Seeds 5–5.8 by 6–7.2 mm, ovoid-lenticular, wings 19–20 by 18–19 mm, extending all around seed margin.