| Name | Polysiphonia nigrescens (Hudson) Greville ex Harvey |
| Authorship | (Hudson) Greville ex Harvey |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Polysiphonia Greville |
| Contains | Polysiphonia nigrescens var. affinis (Moore) Harvey |
| Remarks | Created from Taxon Name Import: Polysiphonia nigrescens (Hudson) Greville ex Harvey |
| GUID | urn:lsid:marinespecies.org:taxname:163502 |
| Holdings | 17 Specimens held in the Harvard University Herbaria identified as Polysiphonia nigrescens (Hudson) Greville ex Harvey |
| Identification made in | [no date] (16), 1959 (1) |
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