Gymnorebutia riograndensis (F.Ritter) Doweld in Sukkulenty 4: 24. 2002 ["2001"] Gymnorebutia riograndensis (F.Ritter) Doweld in Sukkulenty 4: 24. 2002 ["2001"]is new combination for Weingartia riograndensis F.Ritter in Cact. Succ. J. Gr. Brit. 23: 9. 1961Taxon for this nameGymnorebutia riograndensis (F.Ritter) Doweld