×Myrtigymnocalycium Mottram in Cactician 4: 218. 2016 ["2014"] ×Myrtigymnocalycium Mottram in Cactician 4: 218. 2016 ["2014"]Taxon for this name×Myrtigymnocalycium Mottram in Cactician 4: 218. 2016 ["2014"]