Echinocactus horizonthalonius f. centrispinus (Engelm.) Schelle, Kakteen: 186. 1926
Echinocactus horizonthalonius f. centrispinus, Kakteen: 186. 1926
is new combination for Echinocactus horizonthalonius var. centrispinus in Proc. Amer. Acad. Arts 3: 276. 1856