| Name | Mammillaria grahamii Engelmann |
| Authorship | Engelmann |
| Rank | Species |
| Placed in | Mammillaria Haworth |
| Contains | Mammillaria grahamii var. oliviae (Orcutt) L. D. Benson |
| Citation | 1856 Proc. Amer. Acad. Arts 3: 262 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Mammillaria grahamii Engelmann |
| Identification made in | [no date] (5) |
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