| Name | Rhytidiadelphus squarrosus (Hedwig) Warnstorf |
| Authorship | (Hedwig) Warnstorf |
| Rank | Species |
| Placed in | Rhytidiadelphus |
| Citation | 1906 Krypt.-fl. Brandenburg 2(5): 918 |
| Holdings | 78 Specimens held in the Harvard University Herbaria identified as Rhytidiadelphus squarrosus (Hedwig) Warnstorf |
| Identification made in | [no date] (78) |