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Quercus glauca
Ring-cup oak is a small to medium evergreen tree from eastern and southern Asia, grown as an ornamental in mild regions. It is hardy in mild winters and is best given a sunny to lightly shaded spot with well-drained soil.
Quercus glauca (syn. Cyclobalanopsis glauca), commonly called ring-cupped oak or Japanese blue oak, 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, Taiwan, and Vietnam. It is placed in subgenus Cerris, section Cyclobalanopsis.
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.
Quercus affinis · Coast Live Oak · White Oak · Golden Oak · Scrub oak · Brant's oak · Turkey Oak · Canyon Live Oak · Scarlet Oak · Daimyo oak · Blue oak · Leather oak
Text excerpted from the Wikipedia article Quercus glauca by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
