Quercus doichangensis A. Camus, Bull. Soc. Bot. France 80: 355. 1933; Trigonobalanus doichangensis (A. Camus) Forman.

Trees to 21 m tall. Young branchlets rust-colored pubescent but dark brown with age. Stipules triangular, pubescent; scar not clear. Petiole 5-12 mm; leaf blade elliptic to ovate-

elliptic, 7-12.5(-18) × 3-6 cm, leathery, densely with rust-colored stellate hairs when young but soon glabrescent, base attenuate, margin entire, apex obtuse to retuse; secondary veins 8-11 on each side of midvein. Male inflorescences 8-14 cm, rust-colored tomentose; stamens ca. 2.5 mm, glabrous, anthers ca. 0.8 mm. Female inflorescences spiciform, 8-10 cm. Stalk of cupule ca. 2 mm. Nut 3-winged, broadly ovate, ca. 5 × 4-5 mm; exocarp rust-colored tomentose; scar triangular, ca. 1.5 mm. Fl. Nov, fr. Mar.

Broad-leaved evergreen forests; 1000-1600(-1900) m. S to SW Yunnan [N Thailand].