| Classification | Asteraceae: Eupatorium |
| Harvard University Herbaria Barcode(s) | 00007197 |
| Type Status | Holotype |
| Collector | C. C. Parry & Edw. Palmer |
| Collector number | 344 |
| Country | Mexico |
| State | San Luis Potosí |
| Geography | North America: North America (CA, US, MX) (Region): Mexico: San Luis Potosí |
| Locality | 6000-8000 ft. |
| Date Collected | 1878 |
| Elevation | 1828 - 2438 m |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/2f636c46-5f29-4117-858e-e888d6a31347 |
| Harvard University Herbaria Barcode | 00007197 |
| Herbarium | GH |
| Family | Asteraceae |
| Type Status | Holotype |
| Holotype of | Eupatorium espinosarum var. ambiguum A. Gray |
| Verified by | D. E. Boufford (A) |
| Date Determined | 1981 |
| Taxon Reference | (for Eupatorium espinosarum var. ambiguum A. Gray) Proc. Amer. Acad. Arts 1879. 15: 28. |
| Family | Asteraceae |
| Determination | Eupatorium espinosarum var. ambiguum A. Gray |
| Determined by | B.L. Robinson (GH) |
| Determination Remarks | [current name] |
| Family | Asteraceae |
| Determination | InQuestion Eupatorium espinosarum var. ambiguum A. Gray |
| Determination Remarks | [label name] |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
