Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
Count: [f] 2c;232o;592f;6085g;41s; †1g
   Class Liliopsida Batsch (1802) see Class Magnoliopsida Brongn. (1843)
  Count: -
     Subclass Commelinidae Takht. (1967) see Order Commelinales Mirb. ex Bercht. & J.Presl (1820)
    Count: [f] 21o;30f;394g
       Superorder Hydatellanae Takht. ex Reveal (1992) see Order Nymphaeales Salisb. ex Bercht. & J.Presl (1820)
      Count: [g] 1o;1f;2g
         Order Hydatellales Cronquist (1980) see Order Nymphaeales Salisb. ex Bercht. & J.Presl (1820)
        Count: [g] 1f;2g
           Family Hydatellaceae U.Hamann (1976)
          Count: [g] 2g
             1 Genus Hydatella Diels, in Diels & Pritzel (1904)
            Count: -
             2 Genus Trithuria Hook.f. (1858)
            Count: -