[plants] Haeckel (1866) - plants
   vascular plants see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998)
     lycophytes see Subphylum Lycophytina "Banks, 1968"
       Class Lycopodiopsida Bartl. (1830)
         Order Isoetales Prantl (1874) - quillworts see Order Isoëtales Prantl (1874)
           Family Isoetaceae Rchb. (1828) see Family Isoëtaceae Rchb. (1828)
             Genus Isoetes L. (1753) see Genus Isoëtes L. (1753)