厚叶柯 (原变种) hou ye ke (yuan bian zhong)

Quercus pachyphylla Kurz, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 44: 197. 1875; Lithocarpus woon-youngii Hu; Pasania pachyphylla (Kurz) Schottky; Synaedrys pachyphylla (Kurz) Koidzumi.

Leaf blade thinly leathery. Cupule 1.5-4.6 cm in diam., enclosing most of nut when young but only 1/3-1/2 when mature; bracts fused with cupule and reduced to scars or triangular, irregularly multilateral. Scar only at base of nut.

Broad-leaved evergreen and mixed forests; 800-1000(-3200) m. SE Xizang, SW Yunnan [Bhutan, NE India, NE Myanmar, Nepal, Sikkim]

In Yunnan, this variety is found in mixed mesophytic forests from 2400-3200 m.