Mammillaria geminispina var. monacantha Lem. & Monv., Cact. Gen. Sp. Nov.: 100. 1839 Mammillaria geminispina var. monacantha Lem. & Monv., Cact. Gen. Sp. Nov.: 100. 1839Taxon for this nameMammillaria geminispina var. monacantha Lem. & Monv.
