| Classification | Cactaceae: Mammillaria |
| Classification 1 | Cactaceae: Epithelantha |
| Classification 2 | Cactaceae: Mammillaria |
| Harvard University Herbaria Barcode(s) | 00063154 |
| Type Status | Possible Isotype |
| Collector | Josiah Gregg |
| Collector number | 508 |
| Country | Mexico |
| State | Coahuila |
| Geography | North America: North America (CA, US, MX) (Region): Mexico: Coahuila |
| Locality | Valley near Azufrora |
| Date Collected | 1848-09-22 |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/27776ee7-f231-4b1b-b7b7-2e3a28404ead |
| Harvard University Herbaria Barcode | 00063154 |
| Herbarium | GH |
| Family | Cactaceae |
| Determination | Mammillaria micromeris var. greggii Engelmann |
| Determination Remarks | [is label name] |
| Family | Cactaceae |
| Determination | Epithelantha micromeris (Engelmann) F. A. C. Weber ex Britton & Rose |
| Determination Remarks | [is Current name] |
| Family | Cactaceae |
| Type Status | Possible Isotype |
| Possible Isotype of | Mammillaria micromeris var. greggii Engelmann |
| Verified by | W. T. Kittredge |
| Date Determined | 2008 |
| Determination Remarks | fide L. D. Benson, Cacti U. S. Canada 956. 1982 |
| Taxon Reference | (for Mammillaria micromeris var. greggii Engelmann) Proc. Amer. Acad. Arts 1856. 3: 261. |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
