Gymnocalycium ritterianum subsp. acentracanthum F.Berger in Gymnocalycium 18: 601. 2005 Gymnocalycium ritterianum subsp. acentracanthum F.Berger in Gymnocalycium 18: 601. 2005Taxon for this nameGymnocalycium ritterianum subsp. acentracanthum F.Berger
