Oaks of the World

General data Classifications List of species Local names Back to
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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;

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, flattened, tomentose, with 8-9 concentric rings wavy-dentate at margin; maturing in 2 years;

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

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Drawing 2