| Name | Porophyllum holwayanum Greenman |
| Authorship | Greenman |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Porophyllum Guettard |
| GUID | urn:lsid:ipni.org:names:239322-1 |
| Citation | 1904 Proc. Amer. Acad. Arts 40: 48 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Porophyllum holwayanum Greenman |
| Identification made in | [no date] (1), 1911 (1), 2014 (1) |
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