Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883) gymnosperms see Class Spermatopsida Subclass Cycadidae Pax (1894) - cycads Order Cycadales Pers. ex Bercht. & J.Presl (1820) - cycads Family Zamiaceae Horan. (1834) Genus Macrozamia Miq. (1842)