| Name | Juncus supiniformis Engelmann | 
| Authorship | Engelmann | 
| Rank | Species | 
| NomenclaturalStatus | NomLeg | 
| Placed in | Juncus | 
| GUID | urn:lsid:ipni.org:names:443551-1 | 
| Citation | 1868 Trans. Acad. Sci. St. Louis 2: 461 | 
| Holdings | 29 Specimens held in the Harvard University Herbaria identified as Juncus supiniformis Engelmann | 
| Identification made in | [no date] (29) |