Tree to 10 m high; polygamous-dioecious; bark brown, smooth; plant ±glabrous. Twigs terete, with clusters of prominently raised transverse ridges 1 mm apart. Leaves petiollate; petiole 5–15 mm long, 3–5 mm wide, channelled; lamina 16–26 cm long, 7–11 cm wide, coriaceous, obovate or obovate-oblong, base cuneate, apex obtuse or rounded, rigid, margins recurved, secondary veins 4–5 pairs per 5 mm, joining submarginal vein 1–3 mm from margin, not or slightly raised above and below, reticulate venation present. Inflorescences of 1–3 flowers, on tubercles in the axillary position where leaves have fallen. Pedicel 10–20 mm long. Flowers 15 mm in diam., bisexual or male; buds globose, conspicuously mucronate; sepals 2, 7–9 mm long, 5–7 mm wide; petals (4–) 6, 6–10 mm long, 4–7 mm wide, oblong-obovate, white; stamens 4–8 mm long, c. 200 in male flowers, fewer or staminodal in bisexual flowers; filaments free, white; anthers oblong or linear, apex obtuse, 1.5–2 mm long; ovary subglobose in bisexual flowers, 2–2.5 mm long; styles 2 mm long, thick, shorter than anthers; stigma large, bilobed. Fruit obliquely ellipsoidal, 70–90 mm long, 25–30 mm wide, acute at both ends. Fruiting calyx lobes 8–9 mm long, falling off with maturity. Seed 1, ±globular, broadly ellipsoid.
Beach thickets, often on limestome, or on the inner edges of mangrove swamps. Rocky places near the shore.
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Grows on all the terraces and occasionally on the plateau.
The wood is hard, heavy, dense and durable in sea water, and is used in the construction of boats and for house-posts. A dye may be obtained from the heartwood.