Gymnocalycium gaponii subsp. geyeri Neuhuber & V.Gapon in Gymnocalycium 21: 752. 2008 Gymnocalycium gaponii subsp. geyeri Neuhuber & V.Gapon in Gymnocalycium 21: 752. 2008Taxon for this nameGymnocalycium gaponii subsp. geyeri Neuhuber & V.Gapon