| Name | Orthotrichum hallii Sullivant & Lesquereux |
| Authorship | Sullivant & Lesquereux |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Orthotrichum |
| Citation | 1874 Icon. Musc. Suppl. (Sullivant) 63: 45 |
| Holdings | 44 Specimens held in the Harvard University Herbaria identified as Orthotrichum hallii Sullivant & Lesquereux |
| Identification made in | [no date] (40), 1994 (1), 1999 (1), 2020 (2) |
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