#order_Psilotales__Psilotales  lower vascular plants having dichotomously branched sporophyte divided into aerial shoot and rhizome and lacking true roots
  supertype:  plant_order__plantorder  the order of plants
  member of:  class_Psilopsida
  member:  family_Psilotaceae__Psilotaceae  small family of lower ferns having nearly naked stems and minute scalelike leaves
     member:  genus_Psilotum__Psilotum  type genus of the Psilotaceae
        member:  whisk_fern__whiskfern  chiefly tropical clump-forming plants of skeletal appearance resembling whisk brooms; lacking roots

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