Kingdom: Plantae > Division: Tracheophyta > Class: Magnoliopsida > Order: Alismatales > Family: Najadaceae > Genus: Najas > Species: Najas flexilis

Naiad - Najas flexilis (Willd.) Rostk. & W.L.E.Schmidt

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Quick facts

Threat status Europe Vulnerable (IUCN)
Protected by EU Habitats Directive and 2 other international agreements
Natura 2000 sites 42 are designated for this species
Most preferred habitats
  • rivers and lakes
Natura 2000 species code 1833


The distribution map is currently disabled. A new map solution will soon become available. In the meantime, please consult other species distribution map providers listed in the Other resources panel below.

Threat and conservation status

IUCN Red List status of threatened species

The IUCN Red List threat status assesses the risk of extinction.

IUCN Red List Category
Not Evaluated
Near Threatened
Regionally Extinct
Not Applicable
Extinct in the Wild
Data Deficient
Least Concern
Critically Endangered

EU conservation status

Conservation status assesses every six years and for each biogeographical region the condition of habitats and species compared to the favourable status as described in the Habitats Directive. The map shows the 2013-2018 assessments as reported by EU Member State. Assessments are further detailed in the summary document available behind the link below.

Natura 2000 sites

Protected in the following Natura 2000 sites

Sitecode Country Site name Action
DK00EX130 Denmark Hanstholm Reservatet, Nors Sø og Vandet Sø Map
FI0301016 Finland Urajärvi Map
FI0306006 Finland Kutajärven alue Map
FI0415007 Finland Siikalahti Map
FI0700030 Finland Särkijärvi Map
IE0000147 Ireland Horn Head and Rinclevan SAC Map
IE0000164 Ireland Lough Nagreany Dunes SAC Map
IE0000185 Ireland Sessiagh Lough SAC Map
IE0000197 Ireland West of Ardara/Maas Road SAC Map
IE0000297 Ireland Lough Corrib SAC Map
IE0000365 Ireland Killarney National Park, Macgillycuddy's Reeks and Caragh River Catchment SAC Map
IE0001141 Ireland Gweedore Bay and Islands SAC Map
IE0001151 Ireland Kindrum Lough SAC Map
IE0001251 Ireland Cregduff Lough SAC Map
IE0001311 Ireland Rusheenduff Lough SAC Map
IE0001342 Ireland Cloonee and Inchiquin Loughs, Uragh Wood SAC Map
IE0001919 Ireland Glenade Lough SAC Map
IE0001932 Ireland Mweelrea/Sheeffry/Erriff Complex SAC Map
IE0001975 Ireland Ballyhoorisky Point to Fanad Head SAC Map
IE0002008 Ireland Maumturk Mountains SAC Map
IE0002031 Ireland The Twelve Bens/Garraun Complex SAC Map
IE0002034 Ireland Connemara Bog Complex SAC Map
IE0002074 Ireland Slyne Head Peninsula SAC Map
IE0002111 Ireland Kilkieran Bay and Islands SAC Map
IE0002118 Ireland Barnahallia Lough SAC Map
IE0002119 Ireland Lough Nageeron SAC Map
IE0002130 Ireland Tully Lough SAC Map
IE0002176 Ireland Leannan River SAC Map
IE0002177 Ireland Lough Dahybaun SAC Map
LV0300400 Latvia Silene Map
LV0303400 Latvia Raznas nacionalais parks Map
LV0303500 Latvia Pape Map
LV0600300 Latvia Augszeme Map
SE0220175 Sweden Södra Kärrlången Map
SE0310434 Sweden Södra Vixen Map
SE0420309 Sweden Hammarsjön Map
LV0100200 Latvia Moricsalas dabas rezervats Map
LV0600900 Latvia Kaucers Map
LTZAR0024 Lithuania Gražutės regioninis parkas Map
LV0304400 Latvia Kurjanovas ezers Map
LTIGN0027 Lithuania Sungardo ežeras Map
AT2140000 Austria Millstätter See-Süd Map

Protected sites

Please note the site map takes a while to display.

Common names and synonyms

Common Name Language Reference
Biegsames Nixkraut German Korneck, D., M. Schnittler & I. Vollmer
Biegssames Nixenkraut German EC-DGXI.d2, ETC/NC
Liden Najade Danish EC-DGXI.d2, ETC/NC
lokana najada Latvian Latvian NRC
Mykt havfrugras Norwegian Direktoratet for Naturforvaltning
Naiad English EC-DGXI.d2, ETC/NC
Sjönajas Swedish EC-DGXI.d2, ETC/NC
Slender naiad English EC-DGXI.d2, ETC/NC
Synonym Author
Caulinia flexilis Willd.
Caulinia fragilis Willd.

Other resources

CoL (accepted name) Catalogue of Life
EoL Encyclopedia of Life
GBIF Global Biodiversity Information Facility
Habitats Directive Art. 17-2006 summary
ITIS (accepted) Interagency Taxonomic Information System
NCBI National Center for Biotechnology Information
PESI (Accepted) Pan-European Species directories Infrastructure
Wikipedia Wikipedia

External data

No external data sets available for this species
European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Phone: +45 3336 7100