Lithocarpus obscurus C. C. Huang & Y. T. Chang

Trees to 30 m tall, glabrous except for inflorescences. Branchlets blackish brown when dry, sparsely lenticellate; lenticels slightly raised. Petiole 3-7 mm; leaf blade 10-19 × 4-8 cm, papery, concolorous, without scalelike glands, base rounded to auriculate, sometimes obtuse, and often asymmetric, margin entire, apex acute to obtuse; secondary veins 9-12 on each side of midvein; tertiary veins abaxially conspicuous. Female inflorescences 10-35 cm; rachis puberulent; cupules in clusters of 3-5. Infructescences to 35 cm; rachis 0.8-1.4 cm thick. Cupule cupular, 6-8 mm × 1-1.5 cm, enclosing hardly 1/2 of nut, dark gray when dry, wall basally thickened; bracts imbricate, small, appressed, usually only subulate apex conspicuous. Nut broadly conical, 1-1.4 × 1.5-2 cm; scar concave. Fr. Oct-Nov.

SE Xizang (Mêdog Xian), W Yunnan

* Broad-leaved evergreen forests; 1500-2500 m.