| Name | Macromitrium greenmanii Grout |
| Authorship | Grout |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Macromitrium |
| Citation | 1944 Bryologist 47: 11 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Macromitrium greenmanii Grout |
| Identification made in | [no date] (1), 1992 (1), 2013 (1) |
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