| Name | Juncus leptocaulis Torr. & A. Gray ex Engelmann |
| Authorship | Torr. & A. Gray ex Engelmann |
| Rank | Species |
| Placed in | Juncus |
| Citation | 1866 Trans. Acad. Sci. St. Louis ii. 454 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Juncus leptocaulis Torr. & A. Gray ex Engelmann |
| Identification made in | [no date] (3) |