| Name | Trillium rivale S. Watson |
| Authorship | S. Watson |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Trillium |
| GUID | urn:lsid:ipni.org:names:325424-2 |
| Citation | 1885 Proc. Amer. Acad. Arts 20: 378 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Trillium rivale S. Watson |
| Identification made in | [no date] (1), 2007 (2) |