Mammillaria severinii Regel & Klein bis, Index Seminum [St. Petersburg (Petropolitanus)] 1860: 46. 1860
Mammillaria severinii, Index Seminum [St. Petersburg (Petropolitanus)] 1860: 46. 1860
has orthographic variant Mammillaria severini
Mammillaria severinii, Index Seminum [St. Petersburg (Petropolitanus)] 1860: 46. 1860