| Name | Hypnum watsonii Lesquereux & James |
| Authorship | Lesquereux & James |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Hypnum Hedwig |
| Citation | 1879 Proc. Amer. Acad. Arts 14: 138 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Hypnum watsonii Lesquereux & James |
| Identification made in | [no date] (4), 2014 (1) |
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