Gymnocalycium amerhauseri Gymnocalycium amerhauseri H.Till in Gymnocalycium 7(3): 133. 1994 sec. Charles 200911. Charles, G. 2009: Gymnocalycium in habitat and culture. – Stamford: Published by the author=Gymnocalycium walteri H.Till in Gymnocalycium 16: 543. 2003 syn. sec. Kew WCVP (2019)2≡Gymnocalycium parvulum var. walteri (H.Till) Milt in Cactaceae Syst. Init. 25: 116. 2015 syn. sec. Kew WCVP (2019)22. Kew WCVP (2019)=Gymnocalycium amerhauseri subsp. altagraciense H.Till & Amerh. in Gymnocalycium 20: 735. 2007 syn. sec. Charles 200933. Charles, G. 2009: Gymnocalycium in habitat and culture. – Stamford: Published by the authorContent