[Angiospermae] J. Lindley (1830) see Infraphylum Angiospermae auct.
   Monocotyledones see Class Liliopsida Batsch (1802)
     Superorder Alismatanae Takht. (1967) see Order Alismatales R.Br. ex Bercht. & J.Presl (1820)
       Order Najadales Bercht. & J.Presl (1820) see Order Alismatales R.Br. ex Bercht. & J.Presl (1820)
         1 Family Scheuchzeriaceae F.Rudolphi (1830), nom. cons.
         2 Family Juncaginaceae Rich. (1808), nom. cons. - arrow-grass family
         3 Family Najadaceae Juss. (1789), nom. cons. - water-nymph family see Subfamily Hydrilloideae
         4 Family Potamogetonaceae Bercht. & J.Presl (1823), nom. cons. - pondweed family
         5 Family Zosteraceae Dumort. (1829), nom. cons.
         6 Family Posidoniaceae Vines (1895), nom. cons.
         7 Family Cymodoceaceae Vines (1895), nom. cons. - Cymodocea family
         8 Family Zannichelliaceae Chevall. (1827), nom. cons. - horned pondweed family see Family Potamogetonaceae Bercht. & J.Presl (1823), nom. cons.