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]
Quercus glauca is a small to medium-sized evergreen broadleaf tree growing to 15–20 m tall. The leaves are a distinct deep purple-crimson on new growth, soon turning glossy green above, glaucous blue-green below, 60–13 mm long and 20–50 mm broad, with a serrated margin. The flowers are catkins, and the fruit are acorns 1–1.6 cm long, with series of concentric rings on the outside of the acorn cup (it is in the "ring-cupped oak" sub-genus).[4]
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]
^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.
^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
External linksedit
photo of herbarium specimen at Missouri Botanical Garden collected in China in 1977
photo of herbarium specimen at Missouri Botanical Garden, collected in Myanmar (Burma) in 1961, showing rings on acorn cups
Media related to Quercus glauca at Wikimedia Commons
Data related to Quercus glauca at Wikispecies
January 01, 1970
quercus, glauca, cyclobalanopsis, glauca, commonly, called, ring, cupped, japanese, blue, tree, beech, family, fagaceae, native, eastern, southern, asia, where, found, afghanistan, bhutan, china, northern, eastern, india, southern, japan, kashmir, korea, myanm. 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 Ring cupped oak Scientific classification 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 glaucaThunb 1784 not F Buerger ex Blume 1851 nor Martrin Donos amp Timb Lagr 1864 nor Bosc ex Loisel 1825 nor Oerst 1869 1 Synonyms 2 List Cyclobalanopsis amamiana Hatus Masam Cyclobalanopsis glauca Thunb Oerst Cyclobalanopsis globosa T P Lin amp T S LiuCyclobalanopsis repandifolia J C Liao J C LiaoCyclobalanopsis sasakii Kaneh Kudo amp Masam Cyclobalanopsis vibrayana Franch amp Sav SchottkyPerytis glauca Thunb Raf Quercus amamiana Hatus Quercus bambusifolia Fortune 1860 not Hance 1857Quercus dentosa Lindl ex Wall name published without descriptionQuercus globosa T P Lin amp T S Liu J C LiaoQuercus ichangensis Nakai ex A CamusQuercus lacera BlumeQuercus laxiflora Lindl ex Wall name published without descriptionQuercus longipes Hu 1951 not Steven 1857Quercus lotungensis Chun amp W C KoQuercus matasii SieboldQuercus repandifolia J C LiaoQuercus sasakii Kaneh Quercus tranninhensis Hickel amp A CamusQuercus vaniotii H Lev Quercus vibrayeana Franch amp Sav Contents 1 Description 2 Cultivation and uses 3 Gallery 4 References 5 External linksDescription editQuercus glauca is a small to medium sized evergreen broadleaf tree growing to 15 20 m tall The leaves are a distinct deep purple crimson on new growth soon turning glossy green above glaucous blue green below 60 13 mm long and 20 50 mm broad with a serrated margin The flowers are catkins and the fruit are acorns 1 1 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 editIt 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 Gallery edit nbsp Detail of acorns and buds nbsp Dried leaves and acornsReferences edit Tropicos Quercus glauca 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 Quercus glauca North Carolina State University a b Huang Chengjiu Zhang Yongtian Bartholomew Bruce Cyclobalanopsis glauca Flora of China Vol 4 via eFloras org Missouri Botanical Garden St Louis MO amp Harvard University Herbaria Cambridge MA Denk Thomas Grimm Guido W Manos Paul S Deng Min amp Hipp Andrew L 2017 Appendix 2 1 An updated infrageneric classification of the oaks xls figshare Retrieved 2023 02 24 Heuze 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 109External links editphoto of herbarium specimen at Missouri Botanical Garden collected in China in 1977 photo of herbarium specimen at Missouri Botanical Garden collected in Myanmar Burma in 1961 showing rings on acorn cups nbsp Media related to Quercus glauca at Wikimedia Commons nbsp Data related to Quercus glauca at Wikispecies Retrieved from https en wikipedia org w index php title Quercus glauca amp oldid 1168604130, wikipedia, wiki, book, books, library,
