| Name | Microthamnion sp. |
| Authorship | |
| Rank | Species |
| Placed in | Microthamnion Nägeli |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Microthamnion sp. |
| Identification made in | [no date] (1) |
| Name | Microthamnion sp. |
| Authorship | |
| Rank | Species |
| Placed in | Microthamnion Nägeli |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Microthamnion sp. |
| Identification made in | [no date] (1) |