living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Embryobionta Cronquist, Takht. & W.Zimm.
         Division Magnoliophyta Cronquist, Takht. & Zimmerm. (1966) see Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996)
           Class Liliopsida Batsch (1802) see Class Magnoliopsida Brongn. (1843)
             Subclass Alismatidae 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)
                 01 Family Aponogetonaceae Planch. (1856), nom. cons. - Cape-pondweed family
                 02 Family Scheuchzeriaceae F.Rudolphi (1830), nom. cons.
                 03 Family Juncaginaceae Rich. (1808), nom. cons. - arrow-grass family
                 04 Family Potamogetonaceae Bercht. & J.Presl (1823), nom. cons. - pondweed family
                 05 Family Ruppiaceae Horan. (1834), nom. cons. - ditch-grass family
                 06 Family Najadaceae Juss. (1789), nom. cons. - water-nymph family see Subfamily Hydrilloideae
                 07 Family Zannichelliaceae Chevall. (1827), nom. cons. - horned pondweed family see Family Potamogetonaceae Bercht. & J.Presl (1823), nom. cons.
                 08 Family Posidoniaceae Vines (1895), nom. cons.
                 09 Family Cymodoceaceae Vines (1895), nom. cons. - Cymodocea family
                 10 Family Zosteraceae Dumort. (1829), nom. cons.