Coryphantha echinus (Engelm.) Orcutt, Circular to Cactus Fanciers, p.i. 1922 Coryphantha echinus (Engelm.) Orcutt, Circular to Cactus Fanciers, p.i. 1922is new combination for Mammillaria echinus Engelm. in Proc. Amer. Acad. Arts 3: 267. 1856Taxon for this nameCoryphantha echinus (Engelm.) Orcutt