| Name | Scirpus validus f. megastachyus Fernald |
| Authorship | Fernald |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Scirpus validus Vahl |
| GUID | urn:lsid:ipni.org:names:291219-2 |
| Citation | 1943 Rhodora 45: 283 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Scirpus validus f. megastachyus Fernald |
| Identification made in | [no date] (1), 1967 (1) |