曼青冈 man qing gang

Quercus oxyodon Miquel, Ann. Mus. Bot. Lugduno-Batavi 1: 114. 1863; Cyclobalanopsis breviradiata W. C. Cheng ex Y. C. Hsu & H. W. Jen; Q. fargesii Franchet; Q. lineata Blume var. grandifolia Skan; Q. lineata var. oxyodon (Miquel) Wenzig.

Trees to 20 m tall. Branchlets tomentose, soon glabrescent. Petiole 2.5-4 cm; leaf blade elliptic to oblong-lanceolate, 12-22 × 3-8 cm, abaxially pruinose to whitish farinose and with adnate simple and furcate hairs but soon glabrescent, adaxially green, base rounded to broadly cuneate and usually oblique, margin serrate, apex acuminate to caudate; midvein abaxially prominent but adaxially impressed; secondary veins 16-24 on each side of midvein; tertiary veins abaxially inconspicuous. Female inflorescences 2-5 cm. Cupule cupular, 1.5-2 cm in diam., enclosing ca. 1/2 of nut, outside thinly grayish brown tomentose, inside white sericeous, wall less than 1 mm thick; bracts in 6-8 rings, margin dentate. Nut ovoid to subglobose, 1.5-2.2 × 1.2-1.7 cm, glabrous or rarely pilose at apex; scar ca. 8 mm in diam., slightly convex; stylopodium ca. 4 mm in diam., with 3 or 4 rings. Fl. May-Jun, fr. Sep-Oct.

Mixed mesophytic forests on mountain slopes and in valleys; 700-2800 m. Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Shaanxi, Sichuan, SE Xizang, Yunnan, Zhejiang [Bhutan, NE India, Myanmar, Nepal]