| Name | Senecio bigelovii var. monocephalus Rothrock |
| Authorship | Rothrock |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Senecio bigelovii A. Gray |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Senecio bigelovii var. monocephalus Rothrock |
| Identification made in | [no date] (1) |
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