| Name | Juncus xiphioides var. triandrus Engelmann |
| Authorship | Engelmann |
| Rank | Variety |
| Placed in | Juncus xiphioides E. Meyer |
| Citation | 1868 Trans. Acad. Sci. St. Louis 2: 482 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Juncus xiphioides var. triandrus Engelmann |
| Identification made in | [no date] (3) |