| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|
| Hydroleaceae | Hydrolea capsularis | | Disturbed wet areas. | Native of tropical America. | |
| Hydroleaceae | Hydrolea corymbosa | Skyflower | Pond cypress savannas, depression meadows. | Ne. SC south to sw. GA and s. FL. | 
|
| Hydroleaceae | Hydrolea ovata | Ovate Fiddleleaf | Swamps, ponds, ditches. | C. GA and Panhandle FL west to TX, north in the interior to sc. TN and MO. | 
|
| Hydroleaceae | Hydrolea quadrivalvis | Waterpod | Swamp forests, backwater sloughs, especially in cypress-gum forests, marshes, ditches. | Se. VA south to c. peninsular FL, west to LA. | 
|
| Hydroleaceae | Hydrolea spinosa var. spinosa | | | S. TX south through Mexico, Central America, South America, and West Indies. | |
| Hydroleaceae | Hydrolea uniflora | | Swamp forests, sloughs, marshes. | Mainly in the Mississippi River Alluvial Plain, west to e. TX and east to AL, TN, and KY. | 
|