| Name | Ephemerum synoicum James |
| Authorship | James |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Ephemerum |
| Citation | 1865 Trans. Amer. Philos. Soc. 9: 106 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Ephemerum synoicum James |
| Identification made in | [no date] (5) |
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