| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Acoraceae | Acorus americanus | American Calamus, Sweetflag | Marshes, wet meadows, other wet areas, limey seeps. | NS west to AK, south to n. NJ, DC (allegedly), c. OH, c. IN, c. IL, IA, NE, MT, ID, and WA. |  |
| Acoraceae | Acorus calamus | European Calamus, Sweetflag | Marshes, wet meadows, other wet areas. | Native of Eurasia, now widespread in e. North America. |  |
| Acoraceae | Acorus gramineus | Japanese Sweetflag, Grassleaf Sweetflag | Naturalized in sand and gravel bars along streams, in suburban settings. | Native of e. Asia. Reported for City of Alexandria (Simmons et al. 2020). |  |
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