| Name | Juncus phaeocephalus var. paniculatus Engelmann | 
| Authorship | Engelmann | 
| Rank | Variety | 
| Placed in | Juncus phaeocephalus Engelmann | 
| Citation | 1868 Trans. Acad. Sci. St. Louis 2: 484 | 
| Holdings | 20 Specimens held in the Harvard University Herbaria identified as Juncus phaeocephalus var. paniculatus Engelmann | 
| Identification made in | [no date] (18), 2022 (2) |