Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883) gymnosperms see Class Spermatopsida Subclass Pinidae Cronquist, Takht. & Zimmerm. (1966) - conifers Order Cupressales Link (1829) Family Taxaceae Gray (1822), nom. cons. - yew family Genus Pseudotaxus W.C.Cheng (1948)