#family_Salviniaceae__Salviniaceae  water ferns
  supertype:  fern_family  families of ferns and fern allies
  member of:  class_Filicopsida
  member:  genus_Salvinia__Salvinia  type genus of the Salviniaceae: water ferns
     member:  floating-moss__Salvinia_rotundifolia__Salvinia_auriculata  free-floating aquatic ferns
  member:  genus_Azolla__Azolla  a genus of fern sometimes placed in its own family Azollaceae
     member:  mosquito_fern__floating_fern__Carolina_pond_fern__Azolla_caroliniana  small free-floating aquatic fern from the eastern United States to tropical America; naturalized in western and southern Europe

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