#family_Rhyniaceae__Rhyniaceae  primitive plants of the Paleozoic
  supertype:  fern_family  families of ferns and fern allies
  member of:  order_Psilophytales
  member:  genus_Rhynia__Rhynia  type genus of the Rhyniaceae; small leafless dichotomously branching fossil plants with terminal sporangia and smooth branching rhizomes
  member:  genus_Horneophyton__Horneophyton  Devonian fossil plant considered one of the earliest forms of vascular land plants; similar to genus Rhynia but smaller

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