• Zamia Kutorga, 1842 (uncertain) [Family: Porifera (awaiting allocation)]
• Zamia Linnaeus, 1763 [Family: Zamiaceae]
• Zamia acuminata Oerst. ex Dyer
• Zamia acuminata Oersted ex Dyer
• Zamia allison-armourii Millsp. accepted as Zamia pumila Linnaeus
• Zamia altensteinii (Miq.) Heynh. accepted as Encephalartos altensteinii Lehm.
• Zamia amazonas D.W. Stev.
• Zamia amazonum D.W. Stev.
• Zamia amblyphyllidia D.W. Stev.
• Zamia amplifolia hort. Bull ex Mast.
• Zamia amplifolia hort.W. Bull ex Mast.
• Zamia amplifrons hort. ex J. Schust. accepted as Ceratozamia mexicana Brongn.
• Zamia angustifolia Jacq.
• Zamia angustissima Miq. accepted as Zamia angustifolia Jacq.
• Zamia atropurpurea Parment. ex Miq. accepted as Ceratozamia mexicana Brongn.
• Zamia aurea hort. ex Miq. accepted as Encephalartos horridus (Jacq.) Lehm.
• Zamia baraquiniana hort. ex Regel accepted as Zamia poeppigiana Mart. & Eichler
• Zamia boliviana (Brongn.) A. DC.
• Zamia brachyphylla hort. ex J. Schust. accepted as Zamia angustifolia Jacq.
• Zamia brongniartii Wedd. accepted as Zamia boliviana (Brongn.) A. DC.
• Zamia caffra Gaertn. accepted as Encephalartos caffer (Thunb.) Lehm.
• Zamia calcicola Britton ex J. Schust. accepted as Zamia integrifolia L. f.
• Zamia calocoma Miq. accepted as Microcycas calocoma (Miq.) A. DC.
• Zamia caracasana Lodd. Cat., 185 ex Miq. accepted as Zamia loddigesii Miq.
• Zamia chamberlainii J. Schust. accepted as Zamia pygmaea Sims
• Zamia chigua Seem.
• Zamia concinna hort. Booth ex Regel accepted as Zamia pumila Linnaeus
• Zamia concinna hort. Par. ex H. Wendl. accepted as Zamia pumila Linnaeus
• Zamia corallipes J. Versch. accepted as Macrozamia spiralis (Salisb.) Miq.
• Zamia corsoniana G. Don accepted as Cycas rumphii Miq.
• Zamia crassifolia hort. ex J. Schust. accepted as Zamia furfuracea L. f.
• Zamia crassifolia hort. Williams ex T. Moore accepted as Encephalartos caffer (Thunb.) Lehm.
• Zamia cremnophila A.P. Vovides, B. Schutzman & B. Dehgan
• Zamia cremnophila Vovides, Schutzman & Dehgan
• Zamia cunaria Dressler & D.W. Stev.
• Zamia cupatiensis Ducke accepted as Zamia ulei U. Dammer
• Zamia cycadifolia Dyer accepted as Zamia loddigesii Miq.
• Zamia cycadifolia Lodd. Cat., 175 ex Miq. accepted as Encephalartos caffer (Thunb.) Lehm.
• Zamia cycadifolia S. Brunn. accepted as Macrozamia fraseri Miq.
• Zamia cycadifolius Jacq. accepted as Encephalartos cycadifolius (Jacq.) Lehm.
• Zamia cycadis L. f. accepted as Encephalartos caffer (Thunb.) Lehm.
• Zamia cylindrica hort. Booth ex Regel accepted as Zamia pumila Linnaeus
• Zamia debilis L. f. accepted as Zamia pumila Linnaeus
• Zamia dentata Voigt accepted as Zamia integrifolia L. f.
• Zamia disodon D.W. Stev. & Sabato
• Zamia dressleri D.W. Stev.
• Zamia elegans hort. ex Yates accepted as Encephalartos caffer (Thunb.) Lehm.
• Zamia elegantissima hort. ex J. Schust. accepted as Encephalartos altensteinii Lehm.
• Zamia elegantissima Schutzman, Vovides & R.S. Adams accepted as Zamia fairchildiana L.D. Gómez
• Zamia elliptica Lodd. Cat., 173 ex Miq. accepted as Encephalartos caffer (Thunb.) Lehm.
• Zamia encephalartoides D.W. Stev.
• Zamia eriolepis hort. ex Dyer accepted as Zamia loddigesii Miq.
• Zamia erosa Cook & Collins accepted as Zamia integrifolia L. f.
• Zamia fairchildiana L.D. Gómez
• Zamia farinosa Corda ex J. Schust. accepted as Zamia loddigesii Miq.
• Zamia ferruginea hort. ex J. Schust. accepted as Zamia loddigesii Miq.
• Zamia fischeri Miq.
• Zamia floridana A. DC. accepted as Zamia integrifolia L. f.
• Zamia forgetiana hort. ex J. Schust. accepted as Zamia skinneri Warsz. ex A. Dietrich
• Zamia forsteri hort. ex J. Schust. accepted as Zamia fischeri Miq.
• Zamia fraseri Van Houtte ex Regel accepted as Macrozamia spiralis (Salisb.) Miq.
• Zamia friderici-guilielmi (Miq.) Heynh. accepted as Encephalartos friderici-guilielmi Lehm.
• Zamia friderici-guilielmi hort. Parment. ex Miq. accepted as Dioon edule Lindl.
• Zamia friderici-guilielmii (Miq.) Heynh. accepted as Encephalartos friderici-guilielmii Lehm.
• Zamia furfuracea L. f.
• Zamia fusca Verschaffelt ex J. Schust. accepted as Zamia verschaffeltii Miq.
• Zamia fuscata hort. ex J. Schust. accepted as Zamia verschaffeltii Miq.
• Zamia galeotti De Vriese accepted as Zamia loddigesii Miq.
• Zamia galeotti de Vriese accepted as Zamia loddigesii Miq.
• Zamia gentryi Dodson
• Zamia glabra hort. ex J. Schust. accepted as Encephalartos altensteinii Lehm.
• Zamia gleina hort. quor. ex Miq. accepted as Encephalartos horridus (Jacq.) Lehm.
• Zamia gracilis Karw. ex J. Schust. accepted as Zamia loddigesii Miq.
• Zamia guggenheimiana Carabia accepted as Zamia angustifolia Jacq.
• Zamia gutierrezi Sauv. accepted as Zamia muricata Willd.
• Zamia herrerae Calderón & Standl.
• Zamia heyderi Lauche accepted as accepted as Zamia integrifolia L. f.
• Zamia hildebrandtii hort. ex Carr. accepted as Encephalartos hildebrandtii A. Braun & Boché
• Zamia horrida Jacq. accepted as Encephalartos horridus (Jacq.) Lehm.
• Zamia horrida Lodd. Cat. 166 ex Miq. accepted as Encephalartos longifolius (Jacq.) Lehm.
• Zamia houtteana Dyer ex J. Schust. accepted as Zamia tuerckheimii Donn. Sm.
• Zamia humilis Salisb. accepted as Zamia pumila Linnaeus
• Zamia hymenophyllidia D.W. Stev.
• Zamia inermis A.P. Vovides, J.D. Rees & Vasq. Torres
• Zamia inermis Vovides, J.D. Rees & Vázq. Torres
• Zamia integrifolia L. f.
• Zamia integrifolia sensu Pursh accepted as Zamia pumila Linnaeus
• Zamia ipetiensis D.W. Stev.
• Zamia jirijirimensis R.E. Schult. accepted as Zamia lecointei Ducke
• Zamia kalbreyeri Dammer ex J. Schust. accepted as Zamia montana A. Braun
• Zamia katzeri Regel ex J. Schust. accepted as Encephalartos altensteinii Lehm.
• Zamia katzeriana (Regel) Rettig accepted as Zamia verschaffeltii Miq.
• Zamia kickxii Miq. accepted as Zamia pygmaea Sims
• Zamia lacandona B. Schutzman & A.P. Vovides
• Zamia lacandona B. Schutzman & Vovides
• Zamia lanuginosa Jacq. accepted as Encephalartos longifolius (Jacq.) Lehm.
• Zamia latifolia Karwinski ex J. Schust. accepted as Ceratozamia latifolia Miq.
• Zamia latifolia Lodd. ex DC. accepted as Zamia muricata Willd.
• Zamia latifoliolata Prenl. accepted as Zamia pumila Linnaeus
• Zamia lawsoniana Dyer accepted as Zamia loddigesii Miq.