Najas flexilis is an
aquatic annual plant native to parts of North America and Europe. It is native to northern and central Europe from Norway to Ireland to Switzerland, and from there across Russia (including
Siberia). It is also considered native throughout most of Canada, and the northern United States in
disjunct populations in southern
California,
Arizona,
Missouri,
South Carolina and
Utah.[2][3] Its common names include slender naiad[1] and nodding waternymph.[4]
Najas flexilis inhabits shallow bodies of
brackish and fresh water such as lakes and bays.[5][6][7] It is also native to northern Europe, where its range includes Scotland,[8] Poland[9] and Sweden.[10] It is rare in the European portion of its range and is strictly protected by Appendix I of the
Berne Convention. The largest population is in Lake Sīveri in Latvia.
^USDA, NRCS (n.d.).
"Najas flexilis". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 20 October 2022.
^Friedrich Wilhelm Bottlieb Theophil Rostkovius & Wilhelm Ludwig Ewald Schmidt. 1824. Flora Sedinensis 382, Najas flexilis
^Carl Ludwig von Willdenow. 1801. Mémoires de l'Académie Royale des Sciences et Belles-Lettres depuis l'Avénement de Fréderic Guillaume II au Thrône 1798: 89, pl. 1, f. 19. 1798[1801].