| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Convolvulaceae | Cressa nudicaulis | Leafless Cressa | Saline or alkali flats. | Coastal se. and s. Texas and adjacent Tamaulipas; Argentina. |  (c) Keith, Eric - CC-BY-NC, permission granted to NCBG |
| Convolvulaceae | Cressa truxillensis | Spreading Alkali-weed | Alkaline lakes and ponds. | Oklahoma, se. Texas, c., Utah, and sc. Oregon south through Mexico and Central America to South America. |  (c) Nickel, Bonnie - CC-BY-ND |