Ferocactus johnstonianus Britton & Rose Ferocactus johnstonianus Britton & Rose, Cactaceae (Britton & Rose) 4: 287. 1923 sec. Hunt 2016=Ferocactus acanthodes var. johnstonianus (Britton & Rose) G. Unger, Gross. Kugelkakteen: 132. 1992 syn. sec. Guzmán & al. 2003