Mammillaria nicholsonii Anon. in J. Hort. Home Farm., ser. III, 60: 7. 1910 Mammillaria nicholsonii Anon. in J. Hort. Home Farm., ser. III, 60: 7. 1910Taxon for this nameMammillaria nicholsonii Anon. in J. Hort. Home Farm., ser. III, 60: 7. 1910