Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883)
   gymnosperms see Class Spermatopsida
     Subclass Ginkgoidae Pax (1900)
       Order Ginkgoales Gorozh. (1904)
         Family Ginkgoaceae Engl. (1897), nom. cons. - maidenhair tree family
           1 Genus Ginkgo L. (1771)