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