Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Magnoliopsida Brongn. (1843) see Subclass Magnoliidae Novák ex Takht. (1967)
     Subclass Nymphaeidae J.W. Walker ex Takht. (1997) see Order Nymphaeales Salisb. ex Bercht. & J. Presl (1820)
       Superorder Ceratophyllanae Takht. (1997) see Superorder Ceratophyllanae Takht. ex Reveal & Doweld (1999)
         Order Ceratophyllales Bischoff (1840)
           1 Family Ceratophyllaceae Gray (1822) - hornwort family