#family_Marsileaceae__Marsileaceae  clover ferns
  supertype:  #fern_family  families of ferns and fern allies
  member of:  #class_Filicopsida
  member:  #genus_Marsilea__Marsilea  clover ferns
     member:  #clover_fern__pepperwort  any of several water ferns of the genus Marsilea having four leaflets
     member:  #water_clover__waterclover__Marsilea_quadrifolia  water fern of Europe and Asia and the eastern United States distinguished by four leaflets resembling clover leaves
  member:  #genus_Pilularia__Pilularia  pillworts
     member:  #pillwort__Pilularia_globulifera  European water fern found around margins of bodies of water or in wet acid soil having small globose sporocarps
  member:  #genus_Regnellidium  1 species of aquatic or semi-aquatic fern
     member:  #regnellidium__Regnellidium_diphyllum  small latex-containing aquatic fern of southern Brazil

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