[plants] Haeckel (1866) - plants
   vascular plants see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998)
     euphyllophytes see Clade Euphyllophyta Lecointre & Le Guyader 2006 [Cantino & Donoghue 2020]
       Spermatophyta Britton & Brown 1896 [Crane & Kenrick 1997], nom. cl. inval. - seed plants see Clade Spermatophyta Britton & Brown 1896 [Cantino, Doyle & Donoghue 2020]
         Gymnospermae Lindl. see Class Spermatopsida
           Class Cycadopsida Brongn. (1843)
             Order Cycadales Pers. ex Bercht. & J.Presl (1820) - cycads
               Family Cycadaceae Pers. (1807), nom. cons. - Cycas family
                 1 Genus Cycas L. (1753)