| Name | Porotrichum alleghaniense (Müller Halle) Grout |
| Authorship | (Müller Halle) Grout |
| Rank | Species |
| Placed in | Porotrichum |
| Citation | 1908 Moss. Hand-lens Microsc. 303. 4 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Porotrichum alleghaniense (Müller Halle) Grout |
| Identification made in | [no date] (5) |
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