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)
               Order Isoetales Prantl (1874) - quillworts see Order Isoëtales Prantl (1874)
                 1 Family †Chaloneriaceae Pigg & G.W.Rothwell (1983)
                 2 Family Isoetaceae Rchb. (1828) see Family Isoëtaceae Rchb. (1828)