| Name | Philonotis longiseta (Michaux) E. Britton |
| Authorship | (Michaux) E. Britton |
| Rank | Species |
| Placed in | Philonotis |
| Contains | Philonotis longiseta var. porteri (Austin) Flowers |
| Citation | 1911 Bryologist 14(3): 44. |
| Holdings | 38 Specimens held in the Harvard University Herbaria identified as Philonotis longiseta (Michaux) E. Britton |
| Identification made in | [no date] (38) |