Melocactus trujilloensis var. schoenii Rauh & Backeb., Descr. Cact. Nov. 1: 36. 1957 ["1956"] Melocactus trujilloensis var. schoenii Rauh & Backeb., Descr. Cact. Nov. 1: 36. 1957 ["1956"]Taxon for this nameMelocactus trujilloensis var. schoenii Rauh & Backeb.