Flora van Nederland Haeckel (1866) - plants
Count: [*] 2p;7c;44o;132f;665g;1827s;151ss;36v
   Division Pteridophyta Schimp. (1879) see Subphylum Pteridophytina (Eichler) Cavalier-Sm. (1998)
  Count: [*] 3c;15f;24g;60s
     Class Filicopsida C.Agardh (1822) - ferns see Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966)
    Count: [*] 12f;21g;41s
       Family Azollaceae Wettst. (1903) see Family Salviniaceae Martinov (1820)
      Count: [*] 1g;2s
         Genus Azolla Lam. (1783)
        Count: [*] 2s
           1 Azolla filiculoides Lam. (1783) - azolla
          Count: -
           2 Azolla caroliniana Willd. - Carolina mosquitofern
          Count: -