| Name | Fissidens firmus Mitten |
| Authorship | Mitten |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Fissidens Hedwig |
| Citation | 1859 J. Proc. Linn. Soc., Bot. Suppl. 2: 139 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Fissidens firmus Mitten |
| Identification made in | [no date] (1), 1989 (2) |
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