Viridiplantae Cavalier-Smith, 1981 - green plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Chlorophyta Pascher (1914) - green algae
     core chlorophytes
       Class Ulvophyceae K.R. Mattox & K.D. Stewart (1984) - ulvophytes
         Ulvales-Ulotrichales
           Order Ulvales Blackman & Tansley
             1 Genus Ulva L. (1753)
             2 Genus Acrochaete Pringsh. (1863)
             3 Genus Blidingia H. Kylin (1947)