Cylindropuntia densiaculeata Backeb., Descr. Cact. Nov. 1: 6. 1957 ["1956"] Cylindropuntia densiaculeata Backeb., Descr. Cact. Nov. 1: 6. 1957 ["1956"]Taxon for this nameCylindropuntia densiaculeata Backeb., Descr. Cact. Nov. 1: 6. 1957 ["1956"]