| Name | Eupatorium rojasii Hassler |
| Authorship | Hassler |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Eupatorium Linnaeus |
| GUID | urn:lsid:ipni.org:names:206812-1 |
| Citation | 1912 Repert. Spec. Nov. Regni Veg. 11: 168 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Eupatorium rojasii Hassler |
| Identification made in | [no date] (2), 1977 (1), 1982 (2) |