| Name | Pterobryon densum Hornschuch |
| Authorship | Hornschuch |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Pterobryon Hornschuch |
| Contains | Pterobryon densum var. peracuminatum Cardot |
| Holdings | 8 Specimens held in the Harvard University Herbaria identified as Pterobryon densum Hornschuch |
| Identification made in | [no date] (8) |
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