Carex trinervis
{{Short description|Species of grass-like plant}}
{{Speciesbox
| image = Carex trinervis inflorescens (2).jpg
| genus = Carex
| species = trinervis
| authority = Degl.[https://www.nhm.ac.uk/our-science/data/uk-species/species/carex_trinervis.html Natural History Museum London - Carex trinervis]
| synonyms =
- Carex cerina
- Carex frisica
- Osculisa trinervis
- Vignea trinervis
| synonyms_ref = [http://www.theplantlist.org/tpl1.1/record/kew-231688 RBG Kew - The Plant List]
}}
Carex trinervis is a species of sedge which is native to Europe.
It is a perennial herb, which grows to a height of 40 cm, has glaucous leaves and spreads by stolons. It bears 2-3, sessile, oblong inflorescences per shoot.[https://www.tela-botanica.org/bdtfx-nn-14460-synthese Tela Botanica - Carex trinervis]
It is found in sandy marshes, damp dune slacks and heaths in coastal areas of Western Europe.[https://www.brc.ac.uk/plantatlas/plant/carex-trinervis Online Atlas of the British and Irish Flora][https://www.tela-botanica.org/bdtfx-nn-14460-synthese Tela Botanica - Carex trinervis] In the British Isles it was only ever identified in Ormesby, Norfolk, where it became extinct in 1869.{{Cite web |url=http://www.speciesrecoverytrust.org.uk/LostLife.html |title=The Species Recovery Trust - Lost Life |access-date=2019-07-25 |archive-url=https://web.archive.org/web/20190428193658/http://www.speciesrecoverytrust.org.uk/LostLife.html |archive-date=2019-04-28 |url-status=dead }}[https://www.brc.ac.uk/plantatlas/plant/carex-trinervis Online Atlas of the British and Irish Flora]