Tree 25-40 m, 50-80 cm ø; buttresses 1-2 m tall and out, concave; bark smooth, pale greyish brown. Branchlets initially densely tomentose by adpressed stellate hairs, later subglabrous, dull grey-brown, sparsely lenticellate; terminal buds ovoid, 3-4 by 2-3 mm, scales narrowly ovate. Leaves thin-coriaceous, (9-)13-18 (-21) by (3-)4-6(-7) cm (index 3-3½), broadest at the middle; surfaces concolorous, dull greyish green, above glabrous, beneath densely tomentose by adpressed, minute stellate hairs; base attenuate-acute, top sharply 1-1½ cm acuminate; midrib prominent beneath, flat above; nerves 7-9 pairs, prominent beneath, impressed above, subparallel, at an angle of 30-45°, arcuating but not anastomosing towards the margin; reticulation fine, dense, sub-scalariform, obscure; petiole ¾-1½ cm, 1-2 mm ø, adaxially flat. Ripe cupule sessile, saucer-shaped, ⅓-½ cm long, 2-2½ cm ø; rim thin, undulate, covering the basal part of the fruit; wall woody, thin, insides densely silky tomentose by adpressed simple hairs, outside densely fulvous tomentose by adpressed stellate hairs; scales subulate, 1-2 mm long, free, patent, densely but irregular set. Ripe fruit depressed ovoid-globose, 1-1½ cm long, 1½-2⅓ cm ø, densely greyish tomentose by adpressed simple hairs, glabrescent, top abruptly rounded-apiculate, base rounded, scar flat, 1½ cm ø; wall woody, 1 mm thick, for the greater part free from the cupule.
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A tree. It grows 40 m tall. It has buttresses up to 2 m tall. The trunk can be 80 cm across. The bark is brown and smooth. It has short spines. The leaves are 22 cm long. The acorns are round and brown and 3.3 cm across.
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