| Name | Plagiochila arctica Bryhn & Kaal. |
| Authorship | Bryhn & Kaal. |
| Rank | Species |
| Placed in | Plagiochila |
| Citation | 1906 Rep. Second Norweg. Arctic Exped. 2(11): 41 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Plagiochila arctica Bryhn & Kaal. |
| Identification made in | [no date] (1) |