| Name | Physcomitrium immersum Sullivant |
| Authorship | Sullivant |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Physcomitrium |
| Citation | 1848 Manual [A. Gray] 648 |
| Holdings | 34 Specimens held in the Harvard University Herbaria identified as Physcomitrium immersum Sullivant |
| Identification made in | [no date] (29), 2011 (4), 2022 (1) |