Ring-cup oak
Quercus glauca Thunb.
- light
- Full sun
- water
- Medium
- tall
- 10.0 m
- wide
- 6.0 m
Fagaceae
Formerly Cyclobalanopsis amamiana, Cyclobalanopsis glauca, Cyclobalanopsis sasakii, Cyclobalanopsis vibrayana, and 9 more
When it flowers
Not known yet in the tropics: too few flowering observations to read a season from.
If a child, a pet or anyone may have eaten a plant, contact a doctor or vet straight away, or call the National Poisons Information Centre (AIIMS, New Delhi) on 1800 116 117, free and open 24 hours.
Something wrong with it?About it
- Grows as
- TreeKew's checklist, not yet checked
- Climate
- TemperateKew's checklist, not yet checked
- Wild in
- Himalaya to Temp. E. AsiaKew's checklist, not yet checked
- Light
- Full sun (6 h or more)Read from RHS, one source
- Height
- 8.0 m to 12 mRead from RHS, one source
- Spread
- 4.0 m to 8.0 mRead from RHS, one source
- Water
- Average: moist, well drainedRead from RHS, one source
- Coldest it survives
- -10 °C (USDA zone 8a)Read from RHS, one source
Not known yet: flowers, heat, hottest it survives.
In other languages (2)
- Chinese
- 波葉櫟, 青冈, 槠子
- Simplified Chinese
- 铁椆, 青冈, 青冈栎
Where this comes from
- Wikidata, read 2026-10-25, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- RHS, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-25, Public domain
- 3D model: Quercus glauca (built for Vanagrha) by Vanagrha, own
A fact “checked by a majority of its sources” was settled by a vote of the pages it was read from, not by a person reading it; one marked “one source” rests on that page alone. Anything else not marked checked has not been checked yet. Where nothing is known, the page says so rather than guess.