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Illustration Najas marina0.jpg
Najas marina
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Monocots
Order: Alismatales
Family: Hydrocharitaceae[1][2][3][4]
Genus: Najas
L. (1753)

see text

Najas is a genus of aquatic plants. It is cosmopolitan in distribution, totalling a few dozen species. Until 1997, it was rarely placed in the Hydrocharitaceae,[1][2] and was often taken as constituting (by itself) the family Najadaceae.[5]

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.[4]

Selected species[edit]


  1. ^ a b Tanaka, Norio; Setoguchi, Hiroaki; Murata, Jin (1997), "Phylogeny of the family hydrocharitaceae inferred fromrbcL andmatK gene sequence data", Journal of Plant Research 110: 329, doi:10.1007/BF02524931 
  2. ^ a b Les, DH; Cleland, MA; Waycott, M (1997), "Phylogenetic studies in Alismatidae, II: Evolution of Marine Angiosperms (Seagrasses) and Hydrophily", Systematic Botany 22: 443, doi:10.2307/2419820 
  3. ^ Genera of Hydrocharitaceae, GRIN Taxonomy for Plants
  4. ^ a b Angiosperm Phylogeny Group (2003). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II". Botanical Journal of the Linnean Society 141(4): 399-436. (Available online: Abstract | Full text (HTML) | Full text (PDF))
  5. ^ 197. Najadaceae A. L. de Jussieu, Flora of North America

External links[edit]