Coryphantha grahamii (Engelm.) Rydb., Fl. Rocky Mts.: 581. 1917 Coryphantha grahamii (Engelm.) Rydb., Fl. Rocky Mts.: 581. 1917is new combination for Mammillaria grahamii Engelm. in Proc. Amer. Acad. Arts 3: 262. 1856Taxon for this nameCoryphantha grahamii (Engelm.) Rydb.