| Name | Trillium cernuum f. billingtonii Farwell |
| Authorship | Farwell |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Trillium cernuum Linnaeus |
| GUID | urn:lsid:ipni.org:names:287496-2 |
| Citation | 1920 Rep. (Annual) Michigan Acad. Sci. 21: 364 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Trillium cernuum f. billingtonii Farwell |
| Identification made in | [no date] (1) |
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