| Name | Orthotrichum affine subsp. sordidum (Sullivant & Lesquereux) Grout |
| Authorship | (Sullivant & Lesquereux) Grout |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Orthotrichum affine Schrader ex Bridel |
| Citation | 1935 Moss Fl. N. Amer. 2: 115 |
| Holdings | 47 Specimens held in the Harvard University Herbaria identified as Orthotrichum affine subsp. sordidum (Sullivant & Lesquereux) Grout |
| Identification made in | [no date] (47) |
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