Description from Flora of China
Pasania echinothola Hu, Bull. Fan Mem. Inst. Biol., Bot. 10: 96. 1940; Lithocarpus echinocupula Hu ex A. Camus; L. hamatus A. Camus.
Trees 10-20 m tall; young branchlets and leaf blades abaxially covered with adherent waxy scalelike trichomes. Petiole 1-1.5 cm; leaf blade elliptic to rarely obovate-elliptic, 15-35 × 5-11 cm, rigidly papery, brown to brownish gray when dry, base acute, margin entire, apex narrowly acuminate to acute; secondary veins 11-14 on each side of midvein, adaxially slightly impressed, abruptly curving apically near margin but not fusing; tertiary veins abaxially slender, evident or not visible. Male inflorescences axillary, 8-12 cm. Female inflorescences 10-15 cm; rachis slender, densely pubescent, sometimes with a few male flowers near apex; cupules solitary, scattered on rachis. Infructescence rachis 4-6 mm thick. Cupule depressed globose, 1-2 × 2-3 cm, completely enclosing nut, often apically split, wall less than 1 mm thick and crustaceous; bracts linear, curved, 3-5 mm, tawny appressed pubescent. Nut depressed globose, 1.2-1.5 × 2-2.8 cm, with tawny appressed ± glossy long hairs, wall ca. 1 mm thick; scar 1.5-1.8 cm in diam., concave. Fl. Mar, fr. Sep-Oct.
Broad-leaved evergreen forests; 200-1200 m. SE Yunnan [N Vietnam]