Najas is the botanical name of a genus of aquatic plants. It is cosmopolitan in distribution, totalling a few dozen species. It usually is taken as constituting (by itself) the family Najadaceae.

The APG II system, of 2003 (unchanged from the APG system, of 1998), places the genus in family Hydrocharitaceae, in the order Alismatales of the monocots.

References and External Links

• Najadaceae in L. Watson and M.J. Dallwitz (1992 onwards) The families of flowering plants: descriptions, illustrations, identification, information retrieval. Version: 9th March 2006. http://delta-intkey.com.
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• Najas japonica Nakai- Flavon's art gallery