Description from Flora of China
Quercus jenseniana Handel-Mazzetti, Anz. Akad. Wiss. Wien, Math.-Naturwiss. Kl. 59: 52. 1922; Cyclobalanopsis pinbianensis Y. C. Hsu & H. W. Jen; Lithocarpus dunnii F. P. Metcalf; Q. pinbianensis (Y. C. Hsu & H. W. Jen) C. C. Huang & Y. T. Chang.
Trees to 35 m tall. Branchlets thick, sulcate, glabrous, densely lenticellate; lenticels pale brown. Petiole 3-5 cm, adaxially sulcate, glabrous; leaf blade elliptic, oblong-elliptic, or obovate-oblong, 12-20(-30) × 6-8(-13) cm, subleathery to leathery, glabrous, base cuneate, broadly cuneate, or subrounded, margin entire, apex caudate to acuminate; midvein abaxially prominent, adaxially impressed; secondary veins 12-18 (-24) on each side of midvein, curving near margin; tertiary veins abaxially slender, evident. Female inflorescences 3-5(-9) cm; rachis lenticels grayish brown, oblong. Infructescences 5-10 cm. Cupule cupular, 0.8-1 × 1.3-1.5 cm, enclosing 1/3-1/2 of nut, outside and inside with thick orangish brown indument but outside glabrescent, wall less than 1 mm thick; bracts in 6-9 rings, margin denticulate. Nut oblong-ovoid, obovoid, or ovoid-conical, 1.7-2.2 × (0.8-)1.3-1.5 cm, yellowish velutinous, glabrescent; scar (3-)6 mm in diam., raised; stylopodium persistent. Fl. Apr-Jun, fr. Oct-Nov of following year.
* Mixed mesophytic forests on mountain slopes, valleys, and along rivers; 300-1700 m. Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Yunnan, Zhejiang