#clover_fern__pepperwort  any of several water ferns of the genus Marsilea having four leaflets
  supertype:  aquatic_fern__aquaticfern__water_fern__waterfern  ferns that grow in water
  member of:  genus_Marsilea
  subtype:  common_nardoo__nardoo__nardo__Marsilea_drummondii  Australian clover fern
  subtype:  water_clover__waterclover__Marsilea_quadrifolia  water fern of Europe and Asia and the eastern United States distinguished by four leaflets resembling clover leaves

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