| 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) | 
