| Name | Silphium atropurpureum f. hirticaule Fernald |
| Authorship | Fernald |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Silphium atropurpureum Retzius |
| GUID | urn:lsid:ipni.org:names:236424-2 |
| Citation | 1939 Rhodora 41: 573 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Silphium atropurpureum f. hirticaule Fernald |
| Identification made in | [no date] (2) |
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