Mammillaria radians DC. in Mém. Mus. Hist. Nat. 17: 111. 1828 Mammillaria radians DC. in Mém. Mus. Hist. Nat. 17: 111. 1828is basionym for Cactus radians (DC.) Kuntze, Revis. Gen. Pl. 1: 261. 1891is basionym for Coryphantha radians (DC.) Britton & Rose, Cactaceae 4: 36. 1923Taxon for this nameMammillaria radians DC.