Viridiplantae Cavalier-Smith, 1981 - green plants see Subkingdom Viridiplantae Caval.-Sm. (1981) Chlorophyta Pascher (1914) - green algae core chlorophytes Class Chlorophyceae Wille (1884) - chlorophytes Sphaeropleales Luerssen (1877) Genus Hydrodictyon Roth, nom. cons.