Digitorebutia ritteri (Wessner) Buining in Succulenta (Netherlands) 22: 53. 1940 Digitorebutia ritteri (Wessner) Buining in Succulenta (Netherlands) 22: 53. 1940is new combination for Lobivia ritteri Wessner in Beitr. Sukkulentenk. Sukkulentenpflege 1938: 3. 1938Taxon for this nameDigitorebutia ritteri (Wessner) Buining