| Name | Polysiphonia fibrillosa (Dillwyn) Sprengel |
| Authorship | (Dillwyn) Sprengel |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Polysiphonia Greville |
| Remarks | Created from Taxon Name Import: Polysiphonia fibrillosa (Dillwyn) Sprengel |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Polysiphonia fibrillosa (Dillwyn) Sprengel |
| Identification made in | [no date] (4) |