Trees to 30 m tall. Branchlets of current year sulcate, dark brown when dry. Petiole 1.5-2 cm, dark brown to blackish when dry, base ± thickened; leaf blade oblong to sometimes ovate-elliptic, 10-15 × 4-6 cm, rigidly leathery, abaxially rust-colored to tawny pulverulent-scurfy, adaxially glabrous, base cuneate and decurrent on petiole, margin entire, apex acute to acuminate; secondary veins 8-11 on each side of midvein, sometimes ramified near margin; tertiary veins abaxially not visible or very slender, evident. Male inflorescences in a panicle, rarely solitary in leaf axils. Female inflorescences sometimes androgynous, 8-20 cm; cupules in clusters of ca. 3. Infructescences usually less than 10 cm; rachis base 7-12 mm thick; lenticels yellowish brown. Cupule turbinate to cupular, 2-2.5 × 2.4-2.8 cm, broadest at middle, enclosing most of nut, wall 2-3 mm thick; bracts triangular-subulate, appressed, puberulent and scurfy. Nut depressed globose to subglobose, ca. 1.5 × 2 cm, appressed puberulent and scurfy, apex narrowed, wall 2-2.5 mm thick; scar covering ca. 1/3 of nut, convex. Fl. May-Jun, fr. Sep-Oct of following year.
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