Coryphantha echinus (Engelm.) Britton & Rose, Cactaceae 4: 42. 1923 Coryphantha echinus (Engelm.) Britton & Rose, Cactaceae 4: 42. 1923is new combination for Mammillaria echinus Engelm. in Proc. Amer. Acad. Arts 3: 267. 1856Taxon for this nameCoryphantha echinus (Engelm.) Britton & Rose, Cactaceae 4: 42. 1923