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Quercus asymmetrica | |
Author | Hickel & A.Camus 1923 Bull. Mus. Natl. Hist. Nat. 29: 601 1923. |
Synonyms | patelliformis Chun 1947 Cyclobalanopsis patelliformis (Chun) Hsu & Wei Jen 1993 |
Local names | tuo pan qing gang; |
Range | North
Vietnam; China (Guangdong, Guangxi, N Jiangxi, Hainan ); 400-1000 m; |
Growth habit | tree to 15 m; |
Leaves |
15-20
cm long, 5-8 cm wide; evergreen; very thick, leathery; oval or oval-lanceolate
; attenuate, acuminate at apex; base asymmetrical, rounded; 2/3 of margin
coarsely toothed; both sides glabrous; bright above, dull below; ; 8-11
vein pairs impressed adaxially, at an angle of 45° with midrib;
all veins sunken adaxially; petiole thick, glabrous, 2 cm long; |
Flowers | 3-5 styles lightly connate at base; big, thick stigmas; |
Fruits | acorn
flattened, 2.3 cm in diameter, 1.8 cm high, with apex depressed and ringed
mucro, basal scar depressed; several on a 1-2 cm long peduncle; enclosed
1/3 in cupule; cup 2.5 cm in diameter, |
Bark, twigs and |
branchlets angular when young, grey brown, hairless, lenticellate on second year; buds ovoid, obtuse, glabrous, with 4 pairs of scales; |
Hardiness zone, habitat | not hardy; wet broadleaves forests; |
Miscellaneous | -- A. Camus : tome 1, p. 328,
n° 65; -- Sub-genus Cerris, Section Cyclobalanopsis; -- Section Glauca, sub-section Oxyodontes (Menitsky); -- Related to Q. disciformis; -- Threatened (IUCN Red List Category : EN) |
Subspecies and varieties |
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