Cleistocactus ×crassiserpens Rauh & Backeb., Descr. Cact. Nov. 1: 17. 1957 ["1956"] Cleistocactus ×crassiserpens Rauh & Backeb., Descr. Cact. Nov. 1: 17. 1957 ["1956"]Taxon for this nameCleistocactus ×crassiserpens Rauh & Backeb.Cleistocactus ×crassiserpens Rauh & Backeb.