| Name | Leptodontium perannulatum R. S. Williams |
| Authorship | R. S. Williams |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Leptodontium |
| Citation | 1908 Bull. Torrey Bot. Club 34: 572 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Leptodontium perannulatum R. S. Williams |
| Identification made in | [no date] (1) |
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