Opuntia macrorhiza Engelm. subsp. macrorhiza in Boston J. Nat. Hist. 6: 206. 1850 sec. Guzmán & al. 2003
- =Opuntia cymochila Engelm. & Bigelow in Proc. Amer. Acad. Arts 3: 295. 1856 syn. sec. Guzmán & al. 2003
- =Opuntia tortispina Engelm. & Bigelow in Proc. Amer. Acad. Arts 3: 293. 1856 syn. sec. Guzmán & al. 2003
- =Opuntia mesacantha var. macrorhiza (Engelm.) J.M. Coult. in Contr. U.S. Natl. Herb. 3: 430. 1896 syn. sec. Guzmán & al. 2003
- =Opuntia compressa var. macrorhiza (Engelm.) L.D. Benson in Proc. Calif. Acad. Sci., ser. 4, 25: 251. 1944 syn. sec. Guzmán & al. 2003