Tree 10-15 m. Twigs sometimes faintly ridged, 3.5-4(-5) mm diameter, early glabrescent, hairs 0.1 mm; older twigs conspicuously lenticellate. Leaves chartaceous or thinly coriaceous, oblong or (ob)lanceolate, 20-35 by 7-12 cm, base rounded or short-attenuate, apex acute-acuminate; upper surface olivaceous or brown, lower surface cinnamon by dense persistent indumentum of stellate(-dendroid) hairs 0.1-0.2(-0.3) mm, mixed with few appressed longer hairs; not papillose; dots absent; midrib above slightly raised, lateral nerves 20-25 per side, at 50-70° to the midrib, flat or sunken, lines of interarching and venation indistinct or invisible; petiole 18-25 by 3.5-5 mm; leaf bud 15 by 3.5 mm, hairs 0.1 (-0.2) mm. Inflorescences between the leaves or below, of the Knema-type: sessile, single or forked, woody, scar-covered brachyblasts to 5 mm long, with hairs 0.1-0.2 mm; bracts caducous; in male: with subumbels of 3-7 flowers, buds of various sizes; female similar, fewer-flowered; flowers with dense hairs (0.3-)0.5 mm long. Male flowers (Whitmore es. TON 3608): pedicel (upcurved when young) 4-5 mm, bracteole ± obovate-elliptic, 5 mm, (sub)persistent; buds (ob)ovoid-ellipsoid, 6 by 3-4 mm, cleft c. 1/3, lobes 0.5 mm thick, perianth inside somewhat callose and bullate (always?). Androecium small, 4 mm; androphore 1 by 0.7 mm, at base with few hairs, dark brown, 0.2-0.3 mm; synandrium 2.5 by 0.8(-l) mm, thecae 16-20, sterile apex more or less acute, 0.5-0.7 mm long, glabrous. Female flowers not seen. Fruits solitary, subsessile, (broadly) ellipsoid (immature fruit subglobose in Kostermans 1039), 5.5-8.5 by 4-5 cm, base rounded or ± attenuate, hairs cinnamon, scurfy, 0.1-0.2 mm; pericarp 10-15 mm thick; seeds ellipsoid(-oblong), 4.5 cm; fruiting peduncle including pedicel thick, 8 by 8 mm.
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