Thelocactus conothelos var. macdowellii (Rebut ex Quehl) Glass & R.A.Foster in Cact. Succ. J. (Los Angeles) 49: 220. 1977
Thelocactus conothelos var. macdowellii in Cact. Succ. J. (Los Angeles) 49: 220. 1977
is new combination for Echinocactus macdowellii in Monatsschr. Kakteenk. 4: 133. 1894