Coryphantha vivipara var. radiosa (Engelm.) Backeb., Cactaceae 5: 2998. 1961 Coryphantha vivipara var. radiosa (Engelm.) Backeb., Cactaceae 5: 2998. 1961is new combination for Mammillaria radiosa Engelm. in Boston J. Nat. Hist. 6(2): 196–197. 1850Taxon for this nameCoryphantha vivipara var. radiosa (Engelm.) Backeb.