| Name | Porophyllum oblongum Rydberg |
| Authorship | Rydberg |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Porophyllum Guettard |
| GUID | urn:lsid:ipni.org:names:239348-1 |
| Citation | 1916 N. Amer. Fl. 34: 186 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Porophyllum oblongum Rydberg |
| Identification made in | [no date] (1), 2008 (1) |
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