[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 Philydraceae Link (1821), nom. cons. - Philydrum family
                   1.1 Genus Helmholtzia F.Muell. (1866)
                   1.2 Genus Orthothylax
                   2 Genus Philydrella Caruel (1878)
                   3 Genus Philydrum Banks ex Gaertn. (1788)