Echinocactus johnstonianus (Britton & Rose) Fosberg in Amer. Midl. Naturalist 27: 257. 1942
Echinocactus johnstonianus in Amer. Midl. Naturalist 27: 257. 1942
is new combination for Ferocactus johnstonianus, Cactaceae 4: 287. 1923
Echinocactus johnstonianus in Amer. Midl. Naturalist 27: 257. 1942
Taxon for this name