Oaks of the World

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 Quercus dentata
AuthorThunb. 1784
Synonymsobovata Bunge 1833
daimio K.Koch 1873, or hort.
koreana Nakai 1914
dentata subsp koreana (Nak.) A.Camus 1938
pseudodentata Uyeki 1932
pinnatifida Franch. & Sav. 1878
dentata var. pinnatifida (Franch. & Sav.) Matsum. 1891
dentata var. grandifolia Koidz. 1912
dentata var. skworzovii Kozlov 1933
Local namesdaimyo oak; kashiwa oak; hu shu ;
RangeJapan, Korea, China; 100-2700 m; introduced in Europe in 1830;
Growth habitmay reaches 15 m, but is most often stunted; crown sparse, loose;
Leaves 15-30 x 6-20 cm, and more; semi-persistent; oboval; leathery; crowded towards branchlet apex; base attenuate, narrow, rounded to heart-shaped; margin sinuate-lobed; lobes rounded apically; dark green, rough above; pubescent below; 4-10 vein pairs; petiole 2-15 mm, stout, hairy;
FlowersApril-May; female flowers at the end of new shoots;
Fruitsacorn 1.5-2.2 cm, ovoid, hairless; sessile cup 1 cm wide, with brownish tomentose, reflexed scales, covering 1/2 or 1/3 of nut; matures in 1 year;

Bark, twigs and
buds

bark thick, corky, strongly furrowed, dark brown; branchlet sulcate, densely pubescent, becoming hairless and brown; bud conic to rounded, tawny, 1 cm;
Hardiness zone, habitathardy; prefers acidic soils; slow growing; can't stand spring frost;
Miscellaneous-- A. Camus : n° 122;
-- wood hard, heavy;
-- There is a wellknown cultivar, very nice : Q.'Pondaim' : it is probably a hybrid between Q.pontica and 
Q.dentata (= daimio), hence the name. (photo = see Q.pontica)
Subspecies and
varieties

2 subspecies:

-- 1/ subsp stewardii (Rehder) A.Camus 1938   (A. Camus : 123)
= Q.stewardii Rehder 1925
sometimes less than 3 m. ; glabrescent leaves; cup scales shorter; China from 1000 to 1800 m (Anhui, Hubei, Jiangxi, Zhejiang);
In Flora of China, it is likely a hybrid with Q.aliena var. acutiserrata, like Q.fenchengensis.

-- 2/ subsp yunnanensis (Franch.) Menitsky 1973
==> see Q. yunnanensis

-- For Govaerts, 2007, Q. koreana is actually a hybrid with Q. aliena (= Q. x maccormickii)

Pictures

drawing 1 (Q.dentata)
drawing 2 (Q.stewardii)