Noun azolla has 1 sense
  1. Azolla, genus Azolla - a genus of fern sometimes placed in its own family Azollaceae
    --1 is a kind of fern genus
    --1 is a member of Salviniaceae, family Salviniaceae
    --1 has members:
     mosquito fern, floating fern, Carolina pond fern, Azolla caroliniana
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