Kingdom Plantae Haeckel (1866) - plants Subkingdom Rhodoplantae G.W.Saunders & Hommers. (2004) 1 Phylum Cyanidiophyta Moehn ex Doweld (2001) [monotypic] see Subphylum Cyanidiophytina 2 Phylum Rhodophyta Wettst. (1901) - red algae