| Name | Juncus effusus var. pylaei (Laharpe) Fernald & Wiegand |
| Authorship | (Laharpe) Fernald & Wiegand |
| Rank | Variety |
| Placed in | Juncus effusus Linnaeus |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Juncus effusus var. pylaei (Laharpe) Fernald & Wiegand |
| Identification made in | [no date] (2) |