Melocactus bahiensis f. amethystinus (Buining & Brederoo) N.P.Taylor in Bradleya 9: 30. 1991 Melocactus bahiensis f. amethystinus (Buining & Brederoo) N.P.Taylor in Bradleya 9: 30. 1991is new combination for Melocactus amethystinus Buining & Brederoo in Krainz, Kakteen 50-51: CVId. 1972Taxon for this nameMelocactus bahiensis f. amethystinus (Buining & Brederoo) N.P.Taylor