Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Pteridobiotina Britton & A. Br. (1896)
     Superdivision Cycadophytanae Doweld (2001) see Superphylum Cycadophytanae Doweld (2001)
       Division Gnetophyta Bessey (1907) [monotypic]
         Class Gnetopsida Eichler ex Kirpot. (1884)
           Order Ephedrales Dumort. (1829) [monotypic]
             Family Ephedraceae Dumort. (1829), nom. cons. - Mormon-tea family
               01 Genus †Alloephedra J.R.Tao & Y.Yang (2003)
               02 Genus †Amphiephedra Miki (1964)
               03 Genus Ephedra L. (1753) - sea grape
               04 Genus †Beipiaoa Dilcher, G.Sun & Shao L.Zheng (2001)
               05 Genus †Eoantha Krassilov (1986)
               06 Genus †Ephedrispermum Rydin, K.R.Pedersen, P.R.Crane & E.M.Friis (2006)
               07 Genus †Ephedrites Göpp. & Berendt in Berendt (1845)
               08 Genus †Erenia Krassilov (1982)
               09 Genus †Chengia Y.Yang, L.B.Lin & Q.Wang (2013)
               10 Genus †Drewria P.R.Crane & G.R. Upchurch (1987)
               11 Genus †Leongathia Krassilov, Dilcher & J.G.Douglas (1998)
               12 Genus †Liaoxia Z.Y. Cao & S.Q.Wu (2006)
               13 Genus †Siphonospermum Rydin & E.M.Friis (2010)