Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883)
Count: -
   gymnosperms see Class Spermatopsida
  Count: [g] 8o;12f;83g
     Subclass Gnetidae Pax (1894) see Class Gnetopsida Eichler ex Kirpot. (1884)
    Count: [g] 3o;3f;3g
       Order Welwitschiales Skottsb. ex Reveal (1993)
      Count: [g] 1f;1g
         Family Welwitschiaceae Caruel (1879), nom. cons.
        Count: [g] 1g
           1 Genus Welwitschia Hook.f. (1862), nom. cons.
          Count: -