| Name | Eupatorium ×cordigerum (Fernald) Fernald |
| Authorship | (Fernald) Fernald |
| Rank | Species |
| Placed in | Eupatorium Linnaeus |
| Citation | 1945 Rhodora 47: 192 |
| Holdings | 28 Specimens held in the Harvard University Herbaria identified as Eupatorium ×cordigerum (Fernald) Fernald |
| Identification made in | [no date] (14), 1971 (1), 1973 (13) |