| Name | Silphium astericus var. angustatum A. Gray |
| Authorship | A. Gray |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Silphium astericus Linnaeus |
| Citation | 1886 Syn. Fl. N. Amer. 1(2): 449 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Silphium astericus var. angustatum A. Gray |
| Identification made in | [no date] (1) |
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