Tree, c. 25 m, c. 40 cm ø; buttresses c. 2 m tall, 10-15 cm thick; bark pale grey, rough; inner bark chocolate-brown, fibrous. Branchlets with a dense brownish, stellate tomentum, glabrescent; lenticels sparse, splitting longitudinally into shallow furrows; terminal bud ovoid-ellipsoid, 3-4 by 2-3 mm, scales ovate, glabrous. Stipules linear-acute, stel-late-tomentose, 2-3 by ½-1 mm. Leaves thick-coriaceous, elliptic-oblong or lanceolate-oblong, 6-15 by 2½-5½ cm; above glossy, glabrous, beneath glaucous, with dense stellate tomentum; entire, slightly undulate in upper part; base rounded or abruptly acute, sometimes asymmetrical, top ½-1 cm acuminate or caudate; midrib and nerves prominent beneath, impressed or flattened above; nerves 6-12 pairs, parallel, arcuating near the margin, at an angle of 60-70°, petiole densely stellate-tomentose when young, soon glabrous, 2-4½ cm, deeply sulcate especially near the top. Male rachis in a paniculate cluster on the lateral new shoot, c. 5-20 cm, densely stellate-tomentose; ♂ flowers: perianth lobes rather thick-coriaceous; filaments slender, hairy at base. Female rachis solitary in the axil of a higher leaf; bracts ovate-acute; ♀ flowers: perianth densely stellate-tomentose, staminodes well-developed, styles short, connate at base. Young cupule obconical-turbinate, base attenuate, lamellae thin, densely stellate-tomentose. Ripe cupule cup-shaped, obconical, tapering towards the base, 1-1.7 cm high and 1½-2 cm ø; lamellae c. 7. Fruit obovoid-globose, c. 2 by 2 cm, top depressed, base convex.
In Malaya it is found in hill Dipterocarp forest at c. 1000 m, and in Borneo in heath forest, also at c. 1000 m. Fl. Jan.-Febr., fr June-July.
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