Thelocactus macdowellii (Rebut ex Quehl) W.T.Marshall in Cact. J. (London) 9: 28. 1947
Thelocactus macdowellii in Cact. J. (London) 9: 28. 1947
is new combination for Echinocactus macdowellii in Monatsschr. Kakteenk. 4: 133. 1894
Thelocactus macdowellii in Cact. J. (London) 9: 28. 1947