| Name | Trematodon ambiguus (Hedwig) Hornschuch |
| Authorship | (Hedwig) Hornschuch |
| Rank | Species |
| Placed in | Trematodon |
| Citation | 1819 Flora 2: 88. |
| Holdings | 83 Specimens held in the Harvard University Herbaria identified as Trematodon ambiguus (Hedwig) Hornschuch |
| Identification made in | [no date] (81), 2004 (1), 2016 (1) |