Gymnocalycium hyptiacanthum subsp. rotundatum Prestlé in Gymnocalycium 33: 1316-1318. 2020 Gymnocalycium hyptiacanthum subsp. rotundatum Prestlé in Gymnocalycium 33: 1316-1318. 2020Taxon for this nameGymnocalycium hyptiacanthum subsp. rotundatum Prestlé