| Name | Polypodium angustifolium f. densifolium Hieronymus |
| Authorship | Hieronymus |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Polypodium angustifolium Swartz |
| GUID | urn:lsid:ipni.org:names:206642-2 |
| Citation | 1904 Bot. Jahrb. Syst. 34: 532 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Polypodium angustifolium f. densifolium Hieronymus |
| Identification made in | [no date] (1) |