Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883)
   angiosperms - flowering plants see Subclass Magnoliidae Novák ex Takht. (1967)
     Subclass Magnoliidae Novák ex Takht. (1967) - angiosperms
       Superorder Nymphaeanae Thorne ex Reveal (1992)
         1 Order Nymphaeales Salisb. ex Bercht. & J.Presl (1820)