Synonyms: Brittonrosea phyllacantha (homotypic); Echinocactus melmsianus; Echinocactus phyllacanthoides; Echinocactus phyllacanthoides var. laevior; Echinocactus phyllacanthus (homotypic); Echinocactus phyllacanthus var. tricuspidatus; Echinocactus phyllantoides; Echinocactus tricuspidatus; Echinofossulocactus phyllacanthus (homotypic); Echinofossulocactus tricuspidatus; Efossus phyllacanthus (homotypic); Efossus tricuspidatus; Ferocactus phyllacanthus (homotypic); Stenocactus tricuspidatus (homotypic)