Japanese sedge
Carex oshimensis Nakai
- light
- Sun–part
- water
- Plenty
- tall
- 44 cm
- wide
- 44 cm
Cyperaceae
Also called Evergold Sedge
When it flowers
Not known yet in the tropics: too few flowering observations to read a season from.
Read from iNaturalist photographs of it in flower. A month counts at 50% of the best month's flowering share (smoothed over three months) and 10% of its flowering count, from at least 100 flowering observations in the band.
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
- Perennial or rhizomatous geophyteKew's checklist, not yet checked
- Climate
- TemperateKew's checklist, not yet checked
- Wild in
- Japan (Izu Shotō)Kew's checklist, not yet checked
- Light
- Full sun to part shade (3 h or more)Read from NC State Extension and Wikipedia, checked by a majority of its sourcesBacked by both sources
- Height
- 41 cm to 48 cmRead from NC State Extension and Wikipedia, checked: the middle of what its sources sayHalfway between its 2 sources, which differ. Sources differ: NC State Extension 1–1.5 ft; Wikipedia 50–50 cm
- Spread
- 41 cm to 48 cmRead from NC State Extension and Wikipedia, checked: the middle of what its sources sayHalfway between its 2 sources, which differ. Sources differ: NC State Extension 12–17 in; Wikipedia 50–50 cm
- Water
- Plenty: wet or constantly moistRead from NC State Extension and Wikipedia, not yet checked: its sources are splitTied: no reading has a majority of the 2 sources, so all are kept for a person to settle. Sources differ: NC State Extension high; Wikipedia medium
- Flowers
- BrownRead from NC State Extension, one source
- Coldest it survives
- -28.9 °C (USDA zone 5a)Read from NC State Extension, one source
Not known yet: heat, hottest it survives.
In other languages (11)
- Chinese (China)
- 大岛薹草
- root
- 金葉苔草
- Chinese
- 金絲薹, 大岛薹草, 欧氏薹草
- Japanese
- オオシマカンスゲ
- Dutch
- Japanse zegge
- Hebrew
- כריך אושימה
- French
- Laîche d'Oshima
- Russian
- Осока ошимская
- Finnish
- oshimasara
- Slovak
- ostrica ošimská
- Turkish
- Japon Sazı
Where this comes from
- iNaturalist, read 2026-10-24, CC0-1.0 (observation counts)
- Wikidata, read 2026-10-24, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- NC State Extension, read 2026-10-25, fact, cited
- Wikipedia, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-24, CC BY-SA 4.0
- iNaturalist, read 2026-10-25, CC BY
- iNaturalist, read 2026-10-25, CC BY
- 3D model: Carex oshimensis (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.