Twig, bud, petiole, stipule outside, lamina beneath, and raceme persistently densely grey-brown to rufous scabrid tomentose; tomentum on lamina beneath. dotted with scattered darker larger tufts. Twig c. 1 mm ø apically, slender, terete. Bud c. 1.5 by 1 mm, small, conical. Stipules c. 3 mm long, narrowly deltoid, fugaceous. Leaves 6-8 by 2.5-3 cm, narrowly ovate-lanceolate; margin revolute; base broadly cuneate; acumen to 5 mm long; nerves 10-12 pairs, with a prominently looped intra-marginal nerve c. 2 mm from the margin; petiole 6-10 mm long, short, slender. Panicle to 6 cm long, terminal or axillary, short, terete, ribbed; irregularly singly or doubly branched; bracteoles to 4 by 3 mm, elliptic, obtuse, densely shortly tomentose outside, sparsely so within. Flower bud to 8 by 3.5 mm, ovoid, obtuse. Calyx densely buff-tawny tomentose outside, sparsely so within, lobes subequal, deltoid, short; outer slightly narrower, more acute. Corolla cream; petals short, narrowly oblong, obtuse, glabrous. Stamens 15, the inner 5 slightly longer than the rest; filaments short, triangular; anthers narrowly oblong, with prominently setose margin; appendage to connective short, slender. Ovary small, subglobose, densely tomentose; style c. 3 times as long as ovary, filiform, pubescent towards base. Fruit calyx as in C. burckii but more scabrid tomentose; shorter lobes 1.2-2 by 0.4 cm, comparatively long, broadly hastate, constricted at base. Nut as in other species.
A main canopy tree of dry acid soils, especially on coastal hills, but also on peaty soils over limestone and mountain ridges inland to 1,500 metres. Podzolic and sandstone soils or on peat overlying limestone, often in heath forest.
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Locally abundant, podsolised soils in heath forest on terraces and sandstone ridges to 1500 m; on peaty soils over limestone in W. Sarawak.