Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883) gymnosperms see Class Spermatopsida Subclass Gnetidae Pax (1894) see Class Gnetopsida Eichler ex Kirpot. (1884) Order Gnetales Mart. (1835) Family Gnetaceae Blume (1833), nom. cons. - Gnetum family Genus Gnetum L. (1767)