| Name | Sphagnum cuspidatum var. falcatum Russow |
| Authorship | Russow |
| Rank | Variety |
| Placed in | Sphagnum cuspidatum Renauld |
| Citation | 1865 Arch. Naturk. Liv- Ehst- Kurlands, Ser. 2, Biol. Naturk. 7: 137. |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Sphagnum cuspidatum var. falcatum Russow |
| Identification made in | [no date] (3) |