| Name | Sphagnum compactum var. rigidum Nees & Hornschuch |
| Authorship | Nees & Hornschuch |
| Rank | Variety |
| Placed in | Sphagnum compactum Lamarck & de Candolle |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Sphagnum compactum var. rigidum Nees & Hornschuch |
| Identification made in | [no date] (4) |
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