Trees to 30 m tall; bark orange-red or orange, shiny, exfoliating in papery flakes. Branchlets reddish brown, glabrous, sometimes resinous glandular. Petiole 0.5-1.5 cm; leaf blade ovate, ovate-elliptic, or ovate-oblong, 3-8 × 2-5 cm, abaxially densely resinous punctate, sparsely villous, adaxially glabrous, base rounded or subcordate, rarely broadly cuneate, margin irregularly and doubly mucronate serrate, apex acuminate; lateral veins 10-14 on each side of midvein. Female inflorescence 1, or 2 or 3 in a raceme, oblong-cylindric, 3-4 × 1-1.2 cm; peduncle slender, ca. 1 cm; bracts 4-7 mm, 3-lobed, middle lobe oblong or lanceolate, lateral lobes spreading, suborbicular, ca. 1/3 as long as middle lobe. Nutlet ovate, 2-3 mm, with membranous wings ca. as wide as nutlet. Fl. May-Jun, fr. Jul-Aug.