| Opuntia gregoriana |
Griffiths |
in Rep. (Annual) Missouri Bot. Gard. 22: 26. 1912. |
| Opuntia rubrifolia |
Engelm. ex J.M.Coult. |
in Contr. U.S. Natl. Herb. 3: 424. 1896. |
| Opuntia recurvospina |
Griffiths |
in Proc. Biol. Soc. Wash. 29: 12. 1916. |
| Opuntia toumeyi |
Rose |
in Contr. U.S. Natl. Herb. 12: 402. 1909. |
| Opuntia blakeana |
Rose |
in Contr. U.S. Natl. Herb. 12: 402. 1909. |
| Opuntia eocarpa |
Griffiths |
in Proc. Biol. Soc. Wash. 29: 11. 1916. |
| Opuntia mohavensis |
Engelm. & J.M.Bigelow |
in Pacif. Railr. Rep. Parke, Bot. 4(5): t. 9, f. 6-8. 1857. |
| Opuntia confusa |
Griffiths |
in Proc. Biol. Soc. Wash. 27: 28. 1914. |
| Opuntia camanchica |
Engelm. & J.M.Bigelow |
in Proc. Amer. Acad. Arts 3: 293. 1856. |
| Opuntia superbospina |
Griffiths |
in Proc. Biol. Soc. Washington 29(3): 13. 1916. |
| Opuntia wootonii |
Griffiths |
in Rep. (Annual) Missouri Bot. Gard. 21: 171. 1910. |
| Opuntia phaeacantha subsp. camanchica |
(Engelm. & J.M.Bigelow) Borg |
Cacti: 96. 1951. |
| Opuntia engelmannii var. wootonii |
(Griffiths) Fosberg |
in Bull. S. Calif. Acad. Sci. 30: 71. 1931. |
| Opuntia phaeacantha var. major |
Engelm. |
in Proc. Amer. Acad. Arts 3: 293. 1856. |
| Opuntia phaeacantha var. nigricans |
Engelm. |
in Proc. Amer. Acad. Arts 3: 293. 1856. |
| Opuntia canada |
Griffiths |
Ill. Stud. Opuntia: 90–91, t. 6, lower f., t. 2, f. 6, t. 13, f. 2, 12. 1909. |
| Opuntia phaeacantha var. camanchica |
(Engelm. & J.M.Bigelow) L.D.Benson |
in Cact. Succ. J. (Los Angeles) 41(3): 125. 1969. |
| Opuntia phaeacantha var. wootonii |
(Griffiths) L.D.Benson |
in Cact. Succ. J. (Los Angeles) 41(3): 125. 1969. |
| Opuntia chihuahuensis |
Rose |
in Contr. U.S. Natl. Herb. 12(7): 291–292. 1909. |
| Opuntia mojavensis |
Engelm. & J.M.Bigelow |
in Proc. Amer. Acad. Arts 3: 293. 1856. |
| Opuntia angustata |
Engelm. & J.M.Bigelow |
in Proc. Amer. Acad. Arts 3: 292. 1856. |
| Opuntia dulcis |
Engelm. |
in Proc. Amer. Acad. Arts 3: 291. 1856. |
| Opuntia engelmannii var. cyclodes |
Engelm. & J.M.Bigelow |
in Proc. Amer. Acad. Arts 3: 291. 1856. |
| Opuntia phaeacantha var. brunnea |
Engelm. |
in Proc. Amer. Acad. Arts 3: 293. 1856. |
| Opuntia procumbens |
Engelm. & J.M.Bigelow |
in Proc. Amer. Acad. Arts 3: 292. 1856. |
| Opuntia phaeacantha var. chihuahuensis |
(Rose) Bravo |
in Cact. Suc. Mex. 19(2): 47. 1974. |
| Opuntia lindheimeri var. dulcis |
(Engelm.) J.M.Coult. |
in Contr. U.S. Natl. Herb. 3(7): 421. 1896. |
| Opuntia engelmannii var. dulcis |
(Engelm.) J.M.Coult. ex K.Schum. |
Gesamtbeschr. Kakt.: 725. 1898. |
| Opuntia zuniensis |
Griffiths |
in Bull. Torrey Bot. Club 43(2): 86–87. 1916. |
| Opuntia lindheimeri var. cyclodes |
(Engelm. & J.M.Bigelow) J.M.Coult. |
in Contr. U.S. Natl. Herb. 3(7): 422. 1896. |
| Opuntia gilvescens |
Griffiths |
in Rep. (Annual) Missouri Bot. Gard.: 87–88. 1909. |
| Opuntia cyclodes |
(Engelm. & J.M.Bigelow) Rose |
in Contr. U.S. Natl. Herb. 13(9): 309. 1911. |
| Opuntia comanchica |
Urlandt |
in Neubert's Deutsch. Gart.-Mag. 40: 156. 1887. |
| Opuntia laevis var. canada |
(Griffiths) Peebles |
in Cact. Succ. J. (Los Angeles) 9: 68. 1937. |
| Opuntia phaeacantha f. brunnea |
(Engelm.) Schelle |
Kakteen: 72. 1926. |
| Opuntia phaeacantha subsp. mojavensis |
(Engelm. & J.M.Bigelow) Guiggi |
in Cactology 3 (Suppl. II): 3. 2012. |
| Opuntia phaeacantha var. castorea |
S.L.Welsh & N.D.Atwood |
Utah Fl.: 75. 2003. |
| Opuntia phaeacantha var. mojavensis |
(Engelm. & J.M.Bigelow) Fosberg |
in Bull. S. Calif. Acad. Sci. 33: 103. 1934. |
| Opuntia phaeacantha var. superbospina |
(Griffiths) L.D.Benson |
in Cact. Succ. J. (Los Angeles) 46: 79. 1974. |
| Opuntia platyacantha f. mojavensis |
(Engelm. & J.M.Bigelow) Schelle |
Kakteen: 72. 1926. |
| Opuntia hanburyana |
F.A.C.Weber ex A.Berger |
in Gard. Chron., ser 3, 1904(1): 34. 1904. |
| Opuntia mesacantha var. sphaerocarpa |
J.M.Coult. ex Wooton & Standl. |
in Contr. U.S. Natl. Herb. 19: 446. 1915. |
