Oaks of the World

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  Quercus macrocalyx
Author Hickel & A.Camus 1921 Ann. Sci. Nat., Bot. X, 3: 383

Cyclobalanopsis macrocalyx (Hickel & A.Camus) M. Deng & Z.K.Zhou 2005
fleuryi Hickel & A. Camus 1923
Cyclobalanopsis fleuryi (Hickel & Camus) Chun ex Q.F.Zheng 1982
tsoi Chun ex Menitsky 1976
Cyclobalanopsis austroyunnanensis Hu 1951
Cyclobalanopsis nengpulaensis H.Li & Y.C.Hsu 1992
megalocarpa A.Camus 1948

Local names fan zeng qing gang ; Fleury oak ;
Range Laos, Vietnam, China (Fujian, Guangdong, Guangxi, Guizhou, Hainan, Jiangxi, Tibet, Yunnan) ; 500-1800 m ;
Growth habit to 25 m tall;
Leaves 13-24 x 4-8 cm; chartaceous; oval-oblong or oblong; apex attenuate shortly acuminate; base cuneate; margin entire or with small teeth near apex; glabrous on both sides (young leaves densely orange brownish tomentose); whitish beneath; midvein slightly raised above; 10-15 veins pairs prominent beneath;  tertiary veins conspicuous; petiole 2-6 cm long, tomentose at first, becoming glabrous;
Flowers in March-April; male inflorescences 10-15 cm long, densely tawny tomentose; pistillate inflorescences solitary, 2.5-3.5 cm long, bearing 4-5 cups, with thick rachis densely orange-brownish tomentose.
Fruits acorn 3-4 cm long, 2-3 cm in diameter, 4-5 together on a 7 mm thick rachis (thicker than twig), almost all covered by thick cup; cupule campanulate, thick, with brown pubescence inside and outside, with 9-13 yellowish white pubescent, subentire rings; basal scar convex ; stylopodium persistent ; maturing in 2 years, from October to December;

Bark, twigs and

bark grey, slightly rough; twigs pubescent ar first, becoming hairless; numerous lenticels;
Hardiness zone, habitat not hardy; prefers granitic soils; wet mountain subtropical forests;
Miscellaneous -- A. Camus : tome 1, p. 178, n 1;
-- Sub-genus Cerris, Section Cyclobalanopsis;
-- Section Semiserrata, sub-section Semiserratae (Menitsky).
-- Today's authors, in 2006, M. Deng and Z.K.Zhou have proved
C. fleuryi to be a synonym.

Subspecies and

--- var. tomentosa F.P.Metcalf 1942 : see  Q.kouangsiensis

--- var. litoralis (Y.C. Hsu & H.W. Jen) M. Deng & Z.K. Zhou 2005
= Cyclobalanopsis litoralis Hsu & Jen 1979
= hainanica Huang & Chang, 1992 nom. inval.
= obconica Hsu ex Z.K. Zhou 1998
see Q. obconica