| Name | Trematodon longicollis Michaux |
| Authorship | Michaux |
| Rank | Species |
| Placed in | Trematodon |
| Citation | 1803 Fl. Bor.-Amer. [Hooker] 2: 289 |
| Holdings | 40 Specimens held in the Harvard University Herbaria identified as Trematodon longicollis Michaux |
| Identification made in | [no date] (40) |
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