Quercus glauca

Last updated

Ring-cupped oak
Quercus Glauca.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fagales
Family: Fagaceae
Genus: Quercus
Subgenus: Quercus subg. Cerris
Section: Quercus sect. Cyclobalanopsis
Species:
Q. glauca
Binomial name
Quercus glauca
Thunb. 1784 not F. Buerger ex Blume 1851 nor Martrin-Donos & Timb.-Lagr. 1864 nor Bosc ex Loisel. 1825 nor Oerst. 1869 [1]
Synonyms [2]
List
  • Cyclobalanopsis amamiana(Hatus.) Masam.
  • Cyclobalanopsis glauca(Thunb.) Oerst.
  • Cyclobalanopsis globosaT.P.Lin & T.S.Liu
  • Cyclobalanopsis repandifolia(J.C.Liao) J.C.Liao
  • Cyclobalanopsis sasakii(Kaneh.) Kudô & Masam.
  • Cyclobalanopsis vibrayana(Franch. & Sav.) Schottky
  • Perytis glauca(Thunb.) Raf.
  • Quercus amamianaHatus.
  • Quercus bambusifoliaFortune 1860 not Hance 1857
  • Quercus dentosaLindl. ex Wall. name published without description
  • Quercus globosa(T.P.Lin & T.S.Liu) J.C.Liao
  • Quercus ichangensisNakai ex A.Camus
  • Quercus laceraBlume
  • Quercus laxifloraLindl. ex Wall. name published without description
  • Quercus longipesHu 1951, not Steven 1857
  • Quercus lotungensisChun & W.C.Ko
  • Quercus matasiiSiebold
  • Quercus repandifoliaJ.C.Liao
  • Quercus sasakiiKaneh.
  • Quercus tranninhensisHickel & A.Camus
  • Quercus vaniotiiH.Lév.
  • Quercus vibrayeanaFranch. & Sav.

Quercus glauca (syn. Cyclobalanopsis glauca), commonly called ring-cupped oak or Japanese blue oak, [3] is a tree in the beech family (Fagaceae). It is native to eastern and southern Asia, where it is found in Afghanistan, Bhutan, China, northern and eastern India, southern Japan, Kashmir, Korea, Myanmar, Nepal, and Vietnam. [4] It is placed in subgenus Cerris, section Cyclobalanopsis. [5]

Contents

Description

Quercus glauca is a small to medium-sized evergreen broadleaf tree growing to 1520 m tall. The leaves are a distinct deep purple-crimson on new growth, soon turning glossy green above, glaucous blue-green below, 6013 mm long and 2050 mm broad, with a serrated margin. The flowers are catkins, and the fruit are acorns 11.6 cm long, with series of concentric rings on the outside of the acorn cup (it is in the "ring-cupped oak" sub-genus). [4]

Cultivation and uses

It is planted as an ornamental tree in regions of Europe and North America with mild winters.

Its acorns are edible. When dried and ground into powder they can be mixed with cereals and used as flour. The roasted seeds can be used as a coffee substitute. The wood of Quercus glauca is a valuable fuelwood. Its leaves and stems are relished by deer. [6]

Related Research Articles

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<i>Quercus lamellosa</i> Species of tree

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<i>Quercus nigra</i> Species of oak tree

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<i>Quercus rex</i> Species of oak tree

Quercus rex is an Asian species of tree in the family Fagaceae. It has been found in the seasonal tropical forests of northern Indochina, northeastern India, and also in the province of Yunnan in southwestern China. It is placed in subgenus Cerris, section Cyclobalanopsis.

<i>Quercus schottkyana</i> Species of tree

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References

  1. Tropicos, Quercus glauca
  2. "Quercus glauca Thunb.". World Checklist of Selected Plant Families . Royal Botanic Gardens, Kew via The Plant List. Note that this website has been superseded by World Flora Online
  3. Quercus glauca North Carolina State University
  4. 1 2 Huang, Chengjiu; Zhang, Yongtian; Bartholomew, Bruce. "Cyclobalanopsis glauca". Flora of China. Vol. 4 via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  5. Denk, Thomas; Grimm, Guido W.; Manos, Paul S.; Deng, Min & Hipp, Andrew L. (2017). "Appendix 2.1: An updated infrageneric classification of the oaks" (xls). figshare. Retrieved 2023-02-24.
  6. Heuzé V., Tran G., Lebas F., 2017. Blue Japanese oak (Quercus glauca). Feedipedia, a programme by INRA, CIRAD, AFZ and FAO. https://www.feedipedia.org/node/109