[plants] Haeckel (1866) - plants
   vascular plants see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998)
     euphyllophytes see Clade Euphyllophyta Lecointre & Le Guyader 2006 [Cantino & Donoghue 2020]
       Spermatophyta Britton & Brown 1896 [Crane & Kenrick 1997], nom. cl. inval. - seed plants see Clade Spermatophyta Britton & Brown 1896 [Cantino, Doyle & Donoghue 2020]
         Class Magnoliopsida Brongn. (1843)
           Monocotyledons see Superorder Lilianae Takht. (1967)
             Order Alismatales R.Br. ex Bercht. & J.Presl (1820)
               Family Hydrocharitaceae Juss. (1789), nom. cons. - tape-grass family
                 Subfamily Anacharidioideae nom. null. see Subfamily Anacharidoideae (Endl.) Thomé (1886)
                   1 Genus Blyxa Noronha ex Thouars (1806)
                   2.1 Genus Elodea Michx. (1803)
                   2.2 Genus Apalanthe Planch. (1848)
                   2.3 Genus Egeria Planch. (1849)
                   3 Genus Ottelia Persoon (1805)