| Name | Carex multicostata Mackenzie |
| Authorship | Mackenzie |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Carex Linnaeus |
| GUID | urn:lsid:ipni.org:names:46686-2 |
| Holdings | 15 Specimens held in the Harvard University Herbaria identified as Carex multicostata Mackenzie |
| Identification made in | [no date] (3), 1839 (1), 1938 (1), 1939 (4), 2007 (6) |