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A shrub or straggling glabrous climber, up to 3 m. tall or more. Stems brown. Leaves astringent, petiolate, often clustered, narrowly to broadly elliptic with a hastate base, a little narrowed above the basal lobes, up to 5 (–9) cm. long, apically acute; lobes reflexed, small, not exceeding 5 × 2 mm.; leaves markedly trinervate (except in very narrow leaves), the lateral nerves arising arcuately from the base of the midrib and remaining complementarily parallel throughout most of their length. Petioles 1–4 cm. long. Inflorescence a much-branched, ± slender, leafless panicle. Flowers in fascicles, on filiform pedicels up to 5 mm. long. Outer tepals 1.75–2 mm. long, ovate, obtuse, later reflexing. Inner tepals wing-like, 5–7 mm. in diameter, ± pellucid, subequal, circular when mature, with a squarish basal sinus 1–1.5 mm. deep, red or reddish-brown, reticulately veined and with a small wart-like reflexed protuberance at the base. Nut trigonous, ovoid, 2–2.5 × 1 mm., brown, shining. Fig. 2/1 and 2.