Trees 5-10 m tall. Branchlets of current year conspicuously sulcate, dark reddish brown, glabrous. Petiole 5-8 mm, sometimes to 3 cm, base ± thickened; leaf blade narrowly oblong to lanceolate, 8-13 × 2.5-4.5 cm, thick to rigidly papery, base broadly cuneate and decurrent on petiole, margin entire, apex acuminate; midvein raised on both surfaces; secondary veins 6-10 on each side of midvein, slender, conspicuous on both surfaces; tertiary veins inconspicuous. Inflorescence solitary or congested at apex of branches of last-year growth, usually androgynous; rachis with early glabrescent, tawny minute hairs. Male flowers above middle of inflorescence, solitary, scattered on rachis. Infructescences 5-8 cm; rachis ca. 2 mm thick, lenticellate. Cupule bowl-shaped, 5-8 mm × 1-1.4 cm, enclosing 1/8-1/5 of nut, wall 0.5-1 mm thick with basal part woody; bracts reduced and united into 6-8 irregular concentric rings, with tawny, waxy scalelike glands and sparsely puberulent. Nut ellipsoid, 1-1.8 × 1-1.4 cm, glabrous, apex pointed to rounded, wall 0.2-0.5 mm thick; scar 5-6 mm in diam., concave. Fl. Apr-May, fr. Jul-Oct of following year.
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