Acanthocalycium thionanthum subsp. ferrarii (Rausch) Schlumpb. in Willdenowia 51: 264. 2021
Acanthocalycium thionanthum subsp. ferrarii in Willdenowia 51: 264. 2021
is new combination for Acanthocalycium ferrarii in Succulenta (Netherlands) 55: 82. 1976
Acanthocalycium thionanthum subsp. ferrarii in Willdenowia 51: 264. 2021