| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Linderniaceae | Hemianthus glomeratus | Manatee Mudflower | Lake margins, ponds. | Panhandle FL (Gadsden County) south to s. FL. | |
| Linderniaceae | Hemianthus micranthemoides | Nuttall's Micranthemum | Muddy, freshwater intertidal shores, possibly extinct. | NY (Hudson River) south to VA (Chesapeake Bay, Potomac River, James River). |