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 Order Bryopsidales J.H.Schaffn. (1922) Genus Halimeda J.V.Lamour. (1812), nom. cons., orth. cons.