#order_Isoetales__Isoetales  aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales
  supertype:  plant_order__plantorder  the order of plants
  member of:  class_Lycopsida
  member:  family_Isoetaceae__Isoetaceae__quillwort_family__quillwortfamily  quillworts; coextensive with the genus Isoetes
     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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