| Name | Pityrogramma williamsii Proctor |
| Authorship | Proctor |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Pityrogramma Link |
| GUID | urn:lsid:ipni.org:names:17448230-1 |
| Citation | 1965 Brit. Fern Gaz. 9: 220 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Pityrogramma williamsii Proctor |
| Identification made in | 1965 (1), 2000 (2) |
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