| Name | Hypnum speciosissimum Sullivant |
| Authorship | Sullivant |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Hypnum Hedwig |
| Citation | 1854 Proc. Amer. Acad. Arts 3: 75 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Hypnum speciosissimum Sullivant |
| Identification made in | [no date] (1), 1996 (1), 2016 (1) |
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