甜槠栲 tian zhu

Quercus eyrei Champion ex Bentham, Hooker’s J. Bot. Kew Gard. Misc. 6: 114. 1854; Castanopsis asymetrica H. Léveillé; C. brachyacantha Hayata; C. caudata Franchet; C. chingii A. Camus; C. eyrei var. brachyacantha (Hayata) C. F. Shen; C. incana A. Camus; C. neocavaleriei A. Camus; Lithocarpus eyrei (Champion ex Bentham) Rehder; Pasania eyrei (Champion ex Bentham) Oersted; Q. castanopsis H. Léveillé; Q. cavaleriei H. Léveillé & Vaniot; Q. cepifera H. Léveillé; Q. trinervis H. Léveillé; Shiia brachyacantha (Hayata) Kudo & Masamune; Synaedrys brachyacantha (Hayata) Koidzumi.

Trees 8-20 m tall; branches glabrous. Petiole 0.7-1.5 cm or rarely longer; leaf blade lanceolate, ovate, ovate-elliptic, or oblong, 5-13 × 1.5-5.5 cm, leathery, abaxially reddish brown to dark reddish brown when dry and with brownish to silver-gray, membranous scalelike trichomes, base slightly decurrent on petiole and inaequilateral or sometimes symmetric, margin entire or with few shallow teeth from middle to apex, apex long acuminate; midvein at least from base to middle adaxially slightly raised; secondary veins 7-11 on each side of midvein, very slender, evident. Infructescence rachis 2-5 mm thick, glabrous or glabrescent. Cupule broadly ovoid to subglobose, 2-3 cm in diam., splitting into 2-4 segments, outside and bracts grayish to yellowish gray puberulent, apically acute to obtuse, wall ca. 1 mm thick; bracts spinelike, usually entirely covering outside of cupule, more densely toward apex but if cupule subglobose then basally glabrous and spines sparser, 4-10 mm but apical ones shorter. Nut 1 per cupule, broadly conical, 0.8-1.4 cm in diam., glabrous; scar basal, 8-10 mm in diam. Fl. Apr-Jun, fr. Sep-Nov of following year.

* Mixed and broad-leaved evergreen forests; 300-1700 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangsu, Jiangxi, Qinghai, Sichuan, Taiwan, Xizang, Zhejiang