General data | Classifications | List of species | Local names | Back to home page |
Quercus macrocalyx | |
Author | Hickel & A.Camus 1921 Ann. Sci. Nat., Bot. X, 3: 383 |
Synonyms |
Cyclobalanopsis macrocalyx (Hickel & A.Camus)
M. Deng & Z.K.Zhou 2005 |
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 ; |
Bark, twigs and |
bark
grey, slightly rough; twigs pubescent ar first, becoming hairless; |
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 varieties |
--- var. tomentosa F.P.Metcalf 1942 : see Q.kouangsiensis --- var. litoralis (Y.C. Hsu & H.W. Jen) M. Deng
& Z.K. Zhou 2005 |
Pictures |