Opuntia diademata var. inermis Speg. in Anales Mus. Nac. Buenos Aires, ser. 3, 4: 511. 1905
Opuntia diademata var. inermis in Anales Mus. Nac. Buenos Aires, ser. 3, 4: 511. 1905
is basionym for Tephrocactus inermis in Cactaceae (Berlin) 1939(2): 15. 1939
is basionym for Opuntia glomerata var. inermis in Natl. Cact. Succ. J. 13: 5. 1958
is basionym for Tephrocactus articulatus var. inermis in Cactus (Paris) 38: 249. 1953