Echinocactus bicolor var. schottii Engelm. in Proc. Amer. Acad. Arts 3: 277. 1856 Echinocactus bicolor var. schottii Engelm. in Proc. Amer. Acad. Arts 3: 277. 1856Taxon for this nameEchinocactus bicolor var. schottii Engelm.
