| Name | Juncus canadensis var. longicaudatus Engelmann |
| Authorship | Engelmann |
| Rank | Variety |
| Placed in | Juncus canadensis J. Gay ex Laharpe |
| GUID | urn:lsid:ipni.org:names:132064-2 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Juncus canadensis var. longicaudatus Engelmann |
| Identification made in | [no date] (2) |