Noun clover fern has 1 sense
  1. clover fern, pepperwort - any of several water ferns of the genus Marsilea having four leaflets
    --1 is a kind of aquatic fern, water fern
    --1 is a member of Marsilea, genus Marsilea
    --1 has particulars:
     nardoo, nardo, common nardoo, Marsilea drummondii; water clover, Marsilea quadrifolia
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