| Name | Sphagnum compactum var. squarrosum Warnstorf |
| Authorship | Warnstorf |
| Rank | Variety |
| Placed in | Sphagnum compactum de Candolle |
| Citation | 1890 Bot. Gaz. 15: 226 |
| Holdings | 7 Specimens held in the Harvard University Herbaria identified as Sphagnum compactum var. squarrosum Warnstorf |
| Identification made in | [no date] (7) |