Coryphantha clavata var. ancistracantha (Lem.) Heinrich ex Backeb., Cactaceae 5: 2915. 1961 Coryphantha clavata var. ancistracantha (Lem.) Heinrich ex Backeb., Cactaceae 5: 2915. 1961is new combination for Mammillaria ancistracantha Lem., Cact. Gen. Sp. Nov.: 36. 1839Taxon for this nameCoryphantha clavata var. ancistracantha (Lem.) Heinrich ex Backeb.