Japanese emperor oak
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Japanese emperor oak ( Quercus dentata ) |
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The Japanese Emperor Oak ( Quercus dentata ) is a medium-sized tree from the genus of oaks in the beech family . The distribution area is in Japan, Korea, in the west and north of China and in eastern Russia.
description
The Japanese emperor oak is a tree up to 25 meters high with an open and often low crown and blackish gray, thick, deeply fissured bark . The shoots are very thick and hairy gray-tomentose. The leaves are 10 to 30 centimeters long, obovate, with a rounded or narrowed tip and a strongly narrowed, rounded or heart-shaped base. There are five to nine rounded lobes on both sides or the leaf margin is only wavy and cupped. Eight to twelve pairs of nerves are formed. The upper side of the leaf is dark green and initially hairy, the underside of young leaves is hairy gray-tomentose, with older leaves soft and yellow-green hairy. The stalk is hairy and 2 to 5 millimeters long. The fruits are about 2 centimeters long, egg-shaped to almost rounded, sitting and about halfway surrounded by a scaly fruit cup with fringed scales at the top. The fruits are in clusters.
The number of chromosomes is 2n = 24.
Distribution and ecology
The distribution area is 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 of Hokkaidō , Honshū , Kyushu and Shikoku and in Korea. It grows in species-poor forests on dry to fresh, acidic to slightly alkaline, sandy-humic soils in sunny locations. The species loves warmth and is usually frost hardy.
Systematics and research history
The Japanese emperor oak ( Quercus dentata ) is a species from the genus of oaks ( Quercus ) in the beech family (Fagaceae). It was first described in 1784 by Carl Peter Thunberg in the Systema Vegetabilium: secundum classes ordines genera species cum characteribus et differentiis. Editio decima quarta .
use
The species is rarely used as an ornamental wood because of the wood or because of the autumn color .
proof
literature
- Andreas Roloff , Andreas Bärtels: Flora of the woods. Purpose, properties and use. With a winter key from Bernd Schulz. 3rd, corrected edition. Eugen Ulmer, Stuttgart (Hohenheim) 2008, ISBN 978-3-8001-5614-6 , p. 499.
Individual evidence
- ↑ German name after Roloff et al .: Flora der Gehölze , p. 499
- ↑ a b c Roloff et al .: Flora der Gehölze , p. 499
- ↑ Quercus dentata at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ a b Quercus dentata. In: Germplasm Resources Information Network (GRIN). United States Department of Agriculture, accessed December 30, 2011 .
Web links
- Quercus dentata inthe IUCN 2013 Red List of Threatened Species . Listed by: World Conservation Monitoring Center, 1998. Retrieved May 7, 2014.