| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Isoetaceae | Isoetes riparia var. reticulata | Reticulate Shore Quillwort | Tidal areas. | DC to VA. | |
| Isoetaceae | Isoetes riparia var. riparia | Shore Quillwort | Shores. | Isoetes riparia is extirpated from most of its historic localities. |