| Name | Mammillaria micromeris var. greggii Engelmann |
| Authorship | Engelmann |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Mammillaria micromeris Engelmann |
| GUID | urn:lsid:ipni.org:names:151274-2 |
| Citation | 1856 Proc. Amer. Acad. Arts 3: 261 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Mammillaria micromeris var. greggii Engelmann |
| Identification made in | [no date] (1), 2008 (1) |