| Name | Hypnum insularum Sullivant |
| Authorship | Sullivant |
| Rank | Species |
| Placed in | Hypnum Hedwig |
| Citation | 1861 Proc. Amer. Acad. Arts 5: 287 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Hypnum insularum Sullivant |
| Identification made in | [no date] (1) |