| unranked_phylum = Archaeplastida | unranked_phylum_authority = Adl et al. 2005 | subdivision_ranks = Phyla | subdivision = Viridiplantae/Plantae Chlorophyta Charophyta Embryophyta Rhodophyta Glaucophyta }} The Archaeplastida or Primoplantae are a major line of eukaryotes, comprising the land plants, green and red algae, and a small group called the glaucophytes. All of these organisms have plastids surrounded by two membranes, suggesting they developed directly from endosymbiotic cyanob… (More on Archaeplastida)