Melocactus macracanthos subsp. stramineus (Suringar) Guiggi in Cactology 2: 35. 2010 Melocactus macracanthos subsp. stramineus (Suringar) Guiggi in Cactology 2: 35. 2010Taxon for this nameMelocactus macracanthos subsp. stramineus (Suringar) Guiggi