无齿青冈 wu chi qing gang

Quercus semiserrata Roxburgh, Fl. Ind. ed. 1832, 3: 641. 1832; Cyclobalanopsis semiserratoides Y. C. Hsu & H. W. Jen; Q. semiserratoides (Y. C. Hsu & H. W. Jen) C. C. Huang & Y. T. Chang.

Trees to 10 m tall. Branchlets tomentose when young, glabrescent. Petiole 1-2 cm, glabrous; leaf blade ovate-oblong to obovate-oblanceolate, 13-25 × 3-7 cm, thinly papery, glabrous, base cuneate, margin entire, apex acuminate to obtuse; midvein and secondary veins abaxially prominent and adaxially slightly raised or flat; secondary veins 9-12 on each side of midvein, curving near margin. Cupule bowl-shaped, ca. 1.2 × 2.5 cm, enclosing 1/2-2/3 of nut, outside brown velutinous, inside brownish tomentose, wall thin; bracts in 6-9 rings, margin undulately denticulate. Nut oblong-ellipsoid, 3.5-4 × ca. 2.2 cm, pilose, apex rounded; scar ca. 1.5 cm in diam., convex; stylopodium persistent.

Wet broad-leaved evergreen forests in valleys; 400-500 m. SE Xizang, Yunnan [Bangladesh, NE India, Myanmar, Thailand]