Echinocactus sessiliflorus var. tetracanthus (Lem.) Monv. ex Lem., Cact. Gen. Sp. Nov.: 88. 1839
Echinocactus sessiliflorus var. tetracanthus, Cact. Gen. Sp. Nov.: 88. 1839
is new combination for Echinocactus tetracanthus, Cact. Aliq. Nov.: 15. 1838