#genus_Isoetes__Isoetes  type and genus of the Isoetaceae and sole extant genus of the order Isoetales
  supertype:  fern_genus  genera of ferns and fern allies
  member of:  family_Isoetaceae
  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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