Rebutia ithyacantha (Cárdenas) Diers in Kakteen And. Sukk. 23: 141. 1972 Rebutia ithyacantha (Cárdenas) Diers in Kakteen And. Sukk. 23: 141. 1972is new combination for Mediolobivia ithyacantha Cárdenas in Cact. Succ. J. (Los Angeles) 42: 35. 1970Taxon for this nameRebutia ithyacantha (Cárdenas) Diers