organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Eukaryota Chatton, 1925 - eukaryotes
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Viridaeplantae Cavalier-Sm. (1981) - green plants see [unranked] Viridiplantae Cavalier-Smith, 1981
         Land plants
           Phylum Lycophyta - lycophytes see Infraphylum Lycophytae (auct.) Cavalier-Sm. (1998)
             Class Lycopsida - club-mosses see Class Lycopodiopsida Bartl. (1830)
               1 Order †Drepanophycales Novák (1961)
               2 Order †Protolepidodendrales Koidzumi (1939)
               3 Order †Lepidodendrales Haeckel (1868)
               4 Order Lycopodiales DC. ex Bercht. & J.Presl (1820)
               5 Order Selaginellales Prantl (1874)
               6 Order †Pleuromeiales F.A. Barkley (1939)
               7 Order Isoetales Prantl (1874) - quillworts see Order Isoëtales Prantl (1874)