Rebutia violaciflora var. knuthiana (Backeb.) Donald in Natl. Cact. Succ. J. 12: 11. 1957
Rebutia violaciflora var. knuthiana in Natl. Cact. Succ. J. 12: 11. 1957
is new combination for Rebutia knuthiana, Kaktus-ABC: 416. 1936 ["1935"]
Rebutia violaciflora var. knuthiana in Natl. Cact. Succ. J. 12: 11. 1957
Taxon for this name