Tephrocactus unguispinus (Backeb.) Backeb. in Cact. Succ. J. (Los Angeles) 23: 15. 1951 Tephrocactus unguispinus (Backeb.) Backeb. in Cact. Succ. J. (Los Angeles) 23: 15. 1951Taxon for this nameTephrocactus unguispinus (Backeb.) Backeb.
