Taxa: Ferocactus cylindraceus, Ferocactus cylindraceus ssp. cylindraceus (Ferocactus acanthodes, Echinocactus acanthodes, Ferocactus cylindraceus var. cylindraceus, Ferocactus acanthodes var. acanthodes), Ferocactus cylindraceus ssp. lecontei (Echinocactus lecontei, Ferocactus lecontei, Ferocactus cylindr
... (show all)aceus var. lecontei, Ferocactus acanthodes var. lecontei), Ferocactus cylindraceus ssp. eastwoodiae (Ferocactus eastwoodiae, Ferocactus cylindraceus var. eastwoodiae, Ferocactus acanthodes var. eastwoodiae), Ferocactus cylindraceus ssp. tortulispinus (Ferocactus cylindraceus var. tortulospinus)