| Name | Orthotrichum sordidum Sullivant & Lesquereux |
| Authorship | Sullivant & Lesquereux |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Orthotrichum |
| Citation | 1870 Musci Appalach. 30 |
| Holdings | 29 Specimens held in the Harvard University Herbaria identified as Orthotrichum sordidum Sullivant & Lesquereux |
| Identification made in | [no date] (27), 2016 (2) |
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