Quercus dentata

Japanese emperor oak ( Quercus dentata )

The Japanese emperor oak ( Quercus dentata ) is a medium sized tree from the kind of oak trees in the family of book -like. The distribution area is located in Japan, Korea, in the west and north of China and eastern Russia.


The Japanese emperor oak is a tree up to 25 meters high with an open and often low an attached crown and blackish gray, thick, deeply furrowed bark cracked. The shoots are hairy and very thick gray felt. The leaves are 10 to 30 inches long, oblong- ovate wrong with a rounded or narrowed tip and strongly narrowed, rounded or heart- shaped base. On both sides there are five to nine rounded lobes or the leaf margin is only wavy - sinuate. There shall be eight to twelve pairs of nerves. The upper leaf surface is dark green and hairy at first, the underside of young leaves is graufilzig hairy, hairy soft and green in older leaves. The stem is hairy and 2-5 millimeters long. The fruits are about 2 inches long, ovate to almost surrounded plump, sitting and about half of a scaly fruit cups with the top edge frayed protruding scales. The fruits are in clusters.

Distribution and ecology

The distribution area is located on the Kuril Islands and in the Khabarovsk region in the eastern part of Russia, in the Chinese provinces of Anhui, Gansu, Guizhou, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Shaanxi, Shandong, Shanxi, Sichuan, Yunnan and Zhejiang, on the Japanese islands Hokkaido, Honshu, Kyushu and Shikoku, and Korea. It grows in species-poor forests on dry to fresh, acidic to slightly alkaline, sandy, humus-rich soils in sunny locations. The species is thermophilic and usually frost hardy.

Systematics and history of research

The Japanese emperor oak ( Quercus dentata ) is a species in the genus of oaks (Quercus ) in the beech family ( Fagaceae ). The first description was in 1784 by Carl Peter Thunberg in the Systema Vegetabilium: secundum classes ordines genera species cum characteribus et differentiis. Editio decima quarta.


The species is rarely used because of the wood or because of the fall foliage as ornamental tree.