#family_Isoetaceae__Isoetaceae__quillwort_family__quillwortfamily  quillworts; coextensive with the genus Isoetes
  supertype:  fern_family  families of ferns and fern allies
  member of:  order_Isoetales
  member:  genus_Isoetes__Isoetes  type and genus of the Isoetaceae and sole extant genus of the order Isoetales
     member:  quillwort  any of several spore-bearing aquatic or marsh plants having short rhizomes and leaves resembling quills; worldwide except Polynesia

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