| Name | Orthotrichum laevigatum f. macounii (Austin) E. Lawton & Vitt |
| Authorship | (Austin) E. Lawton & Vitt |
| Rank | Forma |
| Placed in | Orthotrichum laevigatum J. E. Zetterstedt |
| Citation | 1971 Moss Fl. Pacific Northwest 222 |
| Holdings | 17 Specimens held in the Harvard University Herbaria identified as Orthotrichum laevigatum f. macounii (Austin) E. Lawton & Vitt |
| Identification made in | [no date] (17) |
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