| Name | Atrichum macmillanii (Holzinger) Frye |
| Authorship | (Holzinger) Frye |
| Rank | Species |
| Placed in | Atrichum |
| Citation | 1937 Moss Fl. N. Amer. 1: 105. |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Atrichum macmillanii (Holzinger) Frye |
| Identification made in | [no date] (1) |