Description from Flora of China
Cyclobalanopsis hypargyrea (Seemen) Y. C. Hsu & H. W. Jen; Quercus glauca Thunberg var. hypargyrea Seemen; Q. hypargyrea (Seemen) C. C. Huang & Y. T. Chang.
Trees to 12 m tall. Branchlets sulcate, lenticellate. Petiole 1-2.7 cm; leaf blade oblong-elliptic to elliptic-lanceolate, 7.5-15.5 × 2.5-5.5 cm, abaxially grayish green, waxy, and with prostrate simple hairs but glabrescent, base cuneate to subrounded, margin apical 2/3 sharply serrate, apex acute to acuminate; secondary veins 10-15 on each side of midvein; tertiary veins abaxially obscure. Infructescences 1-2 cm, 2-6-fruited. Cupule cupular, ca. 8 mm × 1-1.5 cm, enclosing less than 1/2 of nut, outside thinly grayish brown puberulent, inside whitish sericeous, wall less than 1 mm thick; bracts in 6 or 7 rings, margin subentire. Nut oblong-ovoid, ca. 1.8 × 1 cm, glabrous; scar 3-5 mm in diam., flat or convex; stylopodium persistent, ca. 1.5 mm in diam. Fr. Oct-Nov of following year from fl.
* Often in pure stands in mountains; 1000-2000 m. S Anhui, Fujian, NE Guangxi, W Hubei, Hunan, Jiangxi, Shaanxi, E Sichuan