| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Alismataceae | Alisma gramineum | Grassleaf Water-plantain | In seasonally flooded areas in impoundments. | This species is circumboreal, ranging in North America south to e. Virginia, New York, Wisconsin, s. Missouri, New Mexico, and California. |  (c) Kosterin, Oleg - CC-BY |
| Alismataceae | Alisma plantago-aquatica | ||||
| Alismataceae | Alisma subcordatum | Southern Water-plantain | Marshes, ponds, stream edges. | Massachusetts west to North Dakota, south to Georgia and Texas. |  (c) Sorrie, Bruce A. - CC-BY |
| Alismataceae | Alisma triviale | Northern Water-plantain | Marshes and swamps. | Newfoundland and Labrador (Newfoundland) west to Alaska, south to s. New Jersey, s. Pennsylvania, Ohio, Indiana, Arkansas, Oklahoma, New Mexico, Arizona, California, and n. Mexico (and according to Fernald to Maryland and West Virginia). Discovered in Kentucky Mountains by V. Voelker (pers.comm.). |  (c) Korol, J. Burke - CC-BY-NC, permission granted to NCBG |