Dioecious erect shrub to 4 m high. Leaves simple, sessile or rarely petiolate, linear, rarely oblong or lanceolate, acute, recurved, attenuate at base, 2–5.3 cm long, 0.1–0.3 cm wide, rarely to 0.6 cm, glabrous, serrate with serrations 1–1.5 mm long, usually entire in lower 1/3; petiole 3–8 mm long. Flowers in 3-or 4-flowered axillary cymes; pedicels 3.5–7.5 mm long. Sepals 3, rarely 4, ovate, 1.5–2 mm long, caducous. Stamens 6, rarely as many as 8. Ovary pubescent. Capsule 3-winged, rarely 4-winged, transversely elliptic or transversely obovate in lateral view, 6–10.5 mm long, 10–16 mm wide, glabrous; wings 3–5 mm wide, membranous; dehiscence septifragal.
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