Oaks of the World

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 Quercus gilva
AuthorBlume 1850
Synonyms Cyclobalanopsis gilva ( Bl.) Oerst. 1867
Cyclobalanopsis hunanensis (Hand.-Mazz.) Cheng & Hong
hunanensis Hand.-Mazz. 1929 (A. Camus = n° 35)
Local namesRed Bark Oak ; ichiigashi ; chi pi qing gang ;
Range Japan; Central China (Fujian, Guangdong, Guizhou, Hunan, Taiwan, Zhejiang); 300-1500 m;
Growth habitreaches 30 m tall, trunk to 3 m in diameter; 
Leaves 6-12 x 2-3.5 cm; persistent; leathery; oblanceolate to oboval-elliptic; shiny green and hairless above, whitish veltutinous beneath with stellate hairs; young leaves bear a yellow tomentum on both sides; margin with sharp teeth in apical half; base cuneate, apex acuminate; 11-18 vein pairs slightly raised underneath; petiole 1-1.5 cm, densely with stellate hairs;
Flowersin April-May; male catkins 7-11 cm long, flowers with 7-8(10) stamens with puberulent anthers; female inflorescences 1-1.5 cm long tomentose; styles almost completely connate;
Fruits acorn mucronate, obovoid-ellipsoid, 1.6-2 cm long, 1-1.3 cm wide; apex hairy; enclosed 1/4 by cup; cup stalkless, 6-8 mm long, 11-15 mm wide, thin (1 mm), yellowish tomentose inside and outside, with 6-7 concentric rings finely dentate or entire; scar 5-6 mm, slightly convex; stylopodium persistent, puberulent; edible; maturing in 1 year;

Bark, twigs and
buds

bark scaly, greyish red, peeling into large plates; twigs densely tawny tomentose becoming glabrous after 3 years;
Hardiness zone, habitathardy; all types of soils, prefers wet ones; good on calcareous soils; fast-growing;
Miscellaneous -- A. Camus : n° 34 ;
-- Sub-genus Cyclobalanopsis, section Gilva (Menitsky);
-- For Menitsky (1974), Q.hunanensis is a true species, in Hunan;
-- Sargent, in 1894, described it as the most beautiful tree he saw in Japan;
Subspecies and
varieties
 
Pictures

drawing