| Name | Polytrichum piliferum var. hyperboreum (R. Brown) Müll. Stuttg. |
| Authorship | (R. Brown) Müll. Stuttg. |
| Rank | Variety |
| Placed in | Polytrichum piliferum Hedwig |
| Citation | 1848 Syn. Musc. Frond. 1: 218 |
| Holdings | 17 Specimens held in the Harvard University Herbaria identified as Polytrichum piliferum var. hyperboreum (R. Brown) Müll. Stuttg. |
| Identification made in | [no date] (17) |
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