| Name | Sphagnum compactum var. subsquarrosum Warnstorf |
| Authorship | Warnstorf |
| Rank | Variety |
| Placed in | Sphagnum compactum de Candolle |
| Citation | 1890 Bot. Gaz. 15: 226. |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Sphagnum compactum var. subsquarrosum Warnstorf |
| Identification made in | [no date] (1) |