Pasania rosthornii Schottky, Bot. Jahrb. Syst. 47: 674. 1912; Lithocarpus dictyoneuron Chun; Synaedrys rosthornii (Schottky) Koidzumi.

Trees 10-15 m tall; branchlets and petioles covered with crisp, early glabrescent hairs and tawny, lamellate waxy scalelike trichomes. Petiole 1-2 cm; leaf blade obovate-elliptic, oblanceolate, or sometimes elliptic, 12-30 × 4-10 cm, ± thickly papery, abaxially pilose along midvein when young but soon glabrescent, margin entire, apex abruptly narrowed and caudate; secondary veins 14-22 on each side of midvein, adaxially conspicuously impressed; tertiary veins abaxially conspicuous, numerous, subparallel. Male inflorescences paniculate or rarely spicate, to 15 cm. Female inflorescences usually with a few male flowers near apex; cupules in cluster of ca. 3. Infructescences 10-12 cm; rachis 4-5 mm thick. Cupule 1-1.6 × 2-3 cm, enclosing 1/2-3/4 of nut, wall ca. 0.5 mm thick and crustaceous; bracts imbricate, triangular, small, covered with tawny waxy scalelike trichomes. Nut depressed globose, 1.4-2 × ca. 2.8 cm, glabrous, apex ± narrowed and pointed, wall ca. 0.5 mm in diam.; scar 1-1.5 cm in diam., concave. Fl. Aug-Oct, fr. Aug-Oct of following year.

* Mixed mesophytic forests; 300-900 m. EC to SW Guangdong, S to SW Guangxi, NE Guizhou, Hunan, SE Sichuan