Not an accepted name (status: unknown).
The accepted name is
Najas flexilis (Willd.) Rostk. & W.L.E.Schmidt, 1824.
Najas flexilis subsp. caespitosa
(Willd.) Rostk. & W.L.E.Schmidt, 1824
21% complete
No common name
Fl. Sedin.: 382 (1824)
Synonyms
No known synonyms