Tephrocactus articulatus var. diadematus (Lem.) Backeb. in Cactus (Paris) 38: 249. 1953 Tephrocactus articulatus var. diadematus (Lem.) Backeb. in Cactus (Paris) 38: 249. 1953is new combination for Opuntia diademata Lem., Cact. Aliq. Nov.: 36. 1838Taxon for this nameTephrocactus articulatus var. diadematus (Lem.) Backeb.