[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)
             Commelinids see Clade Commelinidae Takhtajan 1967 [Graham, Saarela & Judd 2020]
               Order Commelinales Mirb. ex Bercht. & J.Presl (1820)
                 Family Pontederiaceae Kunth (1816), nom. cons. - water-hyacinth family
                   1 Genus Eichhornia Kunth (1842), nom. cons.
                   2.1 Genus Heteranthera Ruiz & Pav. (1794), nom. cons.
                   2.2 Genus Eurystemon E.J. Alexander (1937)
                   2.3 Genus Zosterella J.K. Small, in J.K. Small & Carter (1913)
                   3 Genus Hydrothrix Hook.f. (1887)
                   4 Genus Monochoria C.Presl (1827)
                   5.1 Genus Pontederia L. (1753)
                   5.2 Genus Reussia Endl. (1836), nom. cons.
                   6 Genus Scholleropsis H. Perrier de la Bathie (1936)