Kingdom [Plantae] Haeckel (1866) - plants Division Gymnospermophyta Cleal (1994) - seed plants see Infraphylum Gymnospermae auct. Class Cycadopsida Brongn. (1843) Order Cycadales Pers. ex Bercht. & J.Presl (1820) [monotypic] - cycads Family Cycadaceae Pers. (1807), nom. cons. - Cycas family