| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Haloragaceae | Proserpinaca palustris | Common Mermaid-weed | Wet places, swamp forests. | Throughout e. North America and south to the Caribbean; Mexico (CHO, VER), Central and South America. |  |
| Haloragaceae | Proserpinaca pectinata | Feathery Mermaid-weed | Bogs, savannas, ditches, other wet places. | NS south to s. FL and west to w. LA, mostly on the Coastal Plain, but scattered inland as well, as in c. TN; Cuba; Mexico (CHP, TAB), Central America. |  |