Oaks of the World

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  Quercus sichourensis
Author (Y.C.Hsu)C.C.Huang & Y.T.Chang 1992 Guihaia 12: 304
Synonyms Cyclobalanopsis sichourensis Hsu 1976
Local names xi chou qing gang ;
Range China (SE Yunnan ); 800-1500 m ;
Growth habit reaches 20 m tall;
Leaves 12-21 x 5-9 cm; oblong to oval-elliptic; leathery, thick; apex acute; base rounded or broadly cuneate; margin slightly toothed near apex; shiny green above; whitish, pilose beneath, above all at vein axils; midrib impressed above; 15-18 vein pairs; tertiary veins evident beneath; petiole 2.5-3.5 cm long, tomentose at first;
Fruits acorn flattened, 2 cm long, 3-4 cm wide; pale orangish tomentose inside and outside; mucronate, depressed at apex; almost all enclosed by cup; cup thin (1.5 mm), tomentose, with 9-10 concentric rings with margin dentate; scar convexe, very broad;

Bark, twigs and

twigs thick, slightly sulcate, with round, greyish brown lenticels;
Hardiness zone, habitat not hardy; broad-leaved evergreen mountain forests;
Miscellaneous -- Sub-genus Cerris, Section Cyclobalanopsis;
-- Threatened (IUCN Red List Category : CR)

Subspecies and
Pictures drawing of sichourensis