Gymnocalycium hyptiacanthum subsp. schroederianum (Osten) Papsch in Gymnocalycium 14: 390. 2001
Gymnocalycium hyptiacanthum subsp. schroederianum in Gymnocalycium 14: 390. 2001
is new combination for Gymnocalycium schroederianum in Anales Mus. Nac. Montevideo 5: 60, pl. 49–50. 1941