Shrub or small tree, 2–3 m. high, glabrous; branches slender, narrowly 4-winged. Leaves opposite, petiolate; lamina 6–9 × c. 2·5–5 cm., chartaceous, bright green, concolorous, ovate to lanceolate or elliptic, shortly and usually very acutely acuminate at the apex, cuneate to rounded at the base, with c. 12–20 main lateral nerves (sometimes alternating with weaker ones) ± prominent on both surfaces, forming a wide angle (60°–80°) with the midrib and anastomosing loosely towards the margin, and with translucent streaks and interrupted lines ± parallel to the lateral veins, but without visible dark longitudinal glandular lines; petiole 4–6 mm. long, channelled above, yellow-green to orange; ligule inconspicuous. Inflorescences terminal or axillary; male flowers c. 5–6 mm. in diam., in few- or many-flowered pedunculate regularly biparous cymes; pedicels 1·5–4 mm. long, pale green. Sepals 4, pale green, the outer pair shorter, broadly ovate to suborbicular, cucullate, the inner pair broadly obovate to orbicular, rounded at the apex. Petals 4, 3–3·5 mm. long, yellow, oblong or oblanceolate, rounded at the apex. Male flowers with 2 antisepalous stamen-fascicles, each of 3 stamens, with filaments completely united and anthers sessile, oblong or elliptic, curved or straight, not septate; ovary-vestige c. 1 mm. in diam., flattened-obconic, with 4-lobed stigma. Female flowers and fruit as yet unknown.
