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 Magnoliopsida Brongn. (1843)
             Subclass Asteridae Takht. (1967) see Superorder Asteranae Takht. (1967)
               Order Callitrichales Link (1829) see Order Lamiales Bromhead (1838)
                 1 Family Hippuridaceae Vest (1818), nom. cons. - mare's-tail family see Subfamily Hippuridoideae (Vest, 1818) Burnett (1835)
                 2 Family Callitrichaceae Link (1821), nom. cons. - water-starwort family see Subfamily Callitrichoideae (Link, 1821) Arn. (1832)
                 3 Family Hydrostachyaceae Engl. (1894), nom. cons. - Hydrostachys family