| Name | Polytrichum longisetum Swartz ex Bridel |
| Authorship | Swartz ex Bridel |
| Rank | Species |
| Placed in | Polytrichum |
| Citation | 1801 [Apr] J. Bot. (Schrader) 1800(1): 286 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Polytrichum longisetum Swartz ex Bridel |
| Identification made in | 2004 (1), 2007 (1), 2012 (1) |
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