Rebutia ritteri var. nigricans (Wessner) Buining & Donald in Sukkulentenkunde 7-8: 103. 1963
Rebutia ritteri var. nigricans in Sukkulentenkunde 7-8: 103. 1963
is new combination for Lobivia nigricans in Kakteenkunde 1940: 51. 1940
Rebutia ritteri var. nigricans in Sukkulentenkunde 7-8: 103. 1963
Taxon for this name