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姚勉（1216～1262），乳名[[二郎]]，学名冲，因避讳改名勉，字述之、成一，号蜚卿、飞卿，古天德乡（今江西宜丰县新庄镇）[[灵源村]]人。宋嘉定9年（1216）生，初生时，曾被弃之山野雪地，故其成年后自号“[[雪坡]]”以志不忘。<ref>[https://www.6baike.com/renwu/YaoMian/ 姚勉] 历史的天空 </ref>
==分类文献==
Cyclobalanopsis edithae (Skan) Schott. in Bot. Jahrb. 47: 650. 1912;中国树木志2: 2316. 1985. ——Quercus edithae Skan in Hook., Icon. Pl. 27: 2661. 1900; A. Camus, Chenes 1: 196. 1936-38, Atlas 1. Pl. 5. f. 1-14. 1934; 海南植物志2: 362. 1965; 中国高等植物图鉴, 补编1: 123. 1982. ——Q. tephrosia Chun et Ko in Acta Phytotax. Sin. 7(1): 41. 1958.
Quercus edithiae Skan, Hooker’s Icon. Pl. 27: t. 2661. 1901; Q. tephrosia Chun & W. C. Ko.
Trees to 20 m tall. Branchlets slightly angular, glabrous; 2nd-year branchlets lenticellate; lenticels loose, small. Petiole 2-3 cm, glabrous; leaf blade oblong-elliptic to somewhat obovate, 5-16 × 2-6 cm, leathery, adaxially dark green, grayish, or whitish, base cuneate, margin apical 1/3 remotely serrulate, apex with a short, blunt tip; midvein adaxially flat; secondary veins 9-12 on each side of midvein, inconspicuous; tertiary veins abaxially conspicuous. Female inflorescences 1-2 cm; cupules 3 or 4. Infructescence rachis short, ca. 1 cm thick, with 1 or 2 fruit. Cupule bowl-shaped, 1.2-1.5 × 1.8-2.5 cm, enclosing 1/4-1/3 of nut, outside orangish brown velutinous, inside orangish brown prostrate villous, wall 2-3 mm thick; bracts in 6-8 rings, margin of basal 2 or 3 subentire, others denticulate. Nut ellipsoid to cylindric-ellipsoid, 3-4.5 × 2-3 cm; scar ca. 7 mm in diam., slightly convex; stylopodium persistent, umbonate, puberulent. Fr. Oct-Dec.
Broad-leaved evergreen forests in mountains; 400-1800 m. Guangdong, Guangxi, Hainan [Vietnam]
==正文==