Melocactus ferreophilus
The Melocactus ferreophilus has 10-12 ribs. It has a bluish tinge close to the cephalium. It is considered as a subspecies of Melocactus azureus by Taylor (1991). Blooming Habits: Fruiting Habits: Check for Field Collection numbers at Ralph Martin's Site Sponsors: www.springhillnursery. More