[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 Zamiaceae Horan. (1834)
                 Tribe Zamieae
                   1 ?Genus Bowenia Hook.f. (1863)
                   2 ?Genus Stangeria T.Moore (1853)
                   3 Genus Ceratozamia Brongn. (1846)
                   4 Genus Chigua D.W. Stev. (1990) see Genus Zamia L. (1763), nom. cons.
                   5 Genus Microcycas (Miq.) A.DC. (1868)
                   6 Genus Zamia L. (1763), nom. cons.