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