| Name | Scirpus debilis var. williamsii Fernald |
| Authorship | Fernald |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Scirpus debilis Pursh |
| GUID | urn:lsid:ipni.org:names:230317-2 |
| Citation | 1901 Rhodora 3: 252 |
| Holdings | 6 Specimens held in the Harvard University Herbaria identified as Scirpus debilis var. williamsii Fernald |
| Identification made in | [no date] (5), 1995 (1) |