Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883)
Count: -
   gymnosperms see Class Spermatopsida
  Count: -
     1 Subclass Ginkgooidae M.W.Chase & Reveal (2009), orth. inval. see Subclass Ginkgoidae Pax (1900)
    Count: -
     2 Subclass Cycadidae Pax (1894) - cycads
    Count: -
     3 Subclass Pinidae Cronquist, Takht. & Zimmerm. (1966) - conifers
    Count: -
     4 Subclass Gnetidae Pax (1894) see Class Gnetopsida Eichler ex Kirpot. (1884)
    Count: -