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Quercus kouangsiensis | |
Author | A.Camus 1937 Bull. Soc. Bot. France 84: 176 |
Synonyms | Cyclobalanopsis kouangsiensis (A.Camus) Y.C.Hsu
& H.Wei Jen 1976 Cyclobalanopsis macrocalyx var. tomentosa Metcalf 1942 nemoralis Chun 1947 |
Local names | guang xi qing gang |
Range | China (Hainan, Guangxi) ;700-900 m ; |
Growth habit | 12-15 m; |
Leaves | 12-18 cm x 3-6 cm; leathery; ovate or oblong-elliptic; base cuneate, apex acute; margin entire or apical 1/3 dentate or denticulate; densely tomentose beneath (stellate, pale greyish brown tomentum); 10-14 vein pairs, prominent above, straight, reaching margin; petiole 1.5-3 cm, densely light brown tomentose; |
Flowers | pistillate inflorescences 1.5
cm, with brown tomentose rachis, from March to April; |
Fruits | acorn 3-4.5 cm long, 2.5 cm
wide; ovoid to cylindrical; silky at first, then glabrous ; apex rounded,
base more or less convex; basal scar 1.5 cm in diameter; enclosed 1/2
or more by cup; cup campanulate, 2-3 cm high, 2-2.8 cm wide, tawny tomentose
outside, silky inside, 1.6-3 mm thick, scales in 8-9 concentric rings
with margin entire or denticulate; maturing in 2 years, in October-December;
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Bark, twigs and |
twig sulcate, densely
tomentose; |
Hardiness zone, habitat | not hardy; |
Miscellaneous | -- A. Camus : n°
1 bis; -- Sub-genus Cerris, Section Cyclobalanopsis; -- Section Semiserrata, sub-section Semiserratae (Menitsky). -- Threatened (IUCN Red List Category : EN). -- Closely related to Q.pachyloma ; -- Differs from Q.macrocalyx in having a thinner cup with fewer concentric rings, a bigger basal scare, leaves tomentose beneath and remotely denticulate in apical half (whereas Q.macrocalyx has hairless, entire, apicaly acuminate leaves). |
Subspecies and varieties |
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Pictures |