| Name | Hypnum laetum Bridel |
| Authorship | Bridel |
| Rank | Species |
| Placed in | Hypnum Hedwig |
| Citation | 1827 Bryol. Univ. 2: 479–480 |
| Holdings | 19 Specimens held in the Harvard University Herbaria identified as Hypnum laetum Bridel |
| Identification made in | [no date] (19) |
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