| Name | Plagiothecium laetum Schimper |
| Authorship | Schimper |
| Rank | Species |
| Placed in | Plagiothecium |
| Contains | Plagiothecium laetum f. tenellum (Schimper) Mönkemeyer |
| Citation | 1851 Bryol. Eur. 5: 185 |
| Holdings | 113 Specimens held in the Harvard University Herbaria identified as Plagiothecium laetum Schimper |
| Identification made in | [no date] (112), 2000 (1) |