| Name | Physcomitrium pygmaeum James |
| Authorship | James |
| Rank | Species |
| Placed in | Physcomitrium |
| Citation | 1871 Botany [Fortieth Parallel] Vol. 5, Botany 5: 404. |
| Holdings | 11 Specimens held in the Harvard University Herbaria identified as Physcomitrium pygmaeum James |
| Identification made in | [no date] (8), 2022 (3) |
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