Echinopsis thionantha subsp. glauca (F.Ritter) M.Lowry in Cactaceae Syst. Init. 19: 12. 2005 Echinopsis thionantha subsp. glauca (F.Ritter) M.Lowry in Cactaceae Syst. Init. 19: 12. 2005is new combination for Acanthocalycium glaucum F.Ritter in Taxon 13(4): 143. 1964Taxon for this nameEchinopsis thionantha subsp. glauca (F.Ritter) M.Lowry