| Name | Gymnomitrion concinnatum (Lightfoot) Corda |
| Authorship | (Lightfoot) Corda |
| Rank | Species |
| Placed in | Gymnomitrion Corda |
| Holdings | 12 Specimens held in the Harvard University Herbaria identified as Gymnomitrion concinnatum (Lightfoot) Corda |
| Identification made in | [no date] (9), 2018 (3) |