Echinocactus porrectus Lem., Cact. Aliq. Nov.: 17. 1838
Echinocactus porrectus, Cact. Aliq. Nov.: 17. 1838
is basionym for Thelocactus porrectus, Kaktus-ABC: 361. 1936 ["1935"]
is basionym for Thelocactus leucacanthus var. porrectus, Cactaceae 5: 2818. 1961