| Name | Trillium sessile var. angustipetalum Torrey |
| Authorship | Torrey |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Trillium sessile Linnaeus |
| GUID | urn:lsid:ipni.org:names:258377-2 |
| Citation | 1857 Pacific Railr. Rep. 4, Pt. 5, No. 4 (Whipple) 151 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Trillium sessile var. angustipetalum Torrey |
| Identification made in | [no date] (1) |