Melocactus azureus subsp. krainzianus (Buining & Brederoo) Guiggi in Cactology 5 (Suppl. 8): 2. 2020
Melocactus azureus subsp. krainzianus in Cactology 5 (Suppl. 8): 2. 2020
is new combination for Melocactus krainzianus in Krainz, Kakteen 62: CVId. 1975