Gymnocalycium schroederianum subsp. schroederianum Gymnocalycium schroederianum subsp. schroederianumis new combination for Gymnocalycium schroederianum Osten in Anales Mus. Nac. Montevideo 5: 60, pl. 49–50. 1941Taxon for this nameGymnocalycium schroederianum subsp. schroederianum