Echinopsis hahniana (Backeb.) R.S.Wallace in Cactaceae Consensus Init. 4: 12. 1997 Echinopsis hahniana (Backeb.) R.S.Wallace in Cactaceae Consensus Init. 4: 12. 1997is new combination for Mediocactus hahnianus Backeb., Descr. Cact. Nov. 1: 10. 1957 ["1956"]Taxon for this nameEchinopsis hahniana (Backeb.) R.S.Wallace