Echinocactus peninsulae F.A.C.Weber in Bull. Mus. Hist. Nat. (Paris) 1: 320. 1895
Echinocactus peninsulae in Bull. Mus. Hist. Nat. (Paris) 1: 320. 1895
is basionym for Ferocactus peninsulae, Cactaceae 3: 133. 1922
is basionym for Ferocactus peninsulae var. peninsulae