| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Asteraceae | Simsia calva | Awnless Bush-sunflower | Prairies, roadsides, scrub. | C. Texas, New Mexico, and Arizona south to Mexico (Chihuahua, Coahuila, Nuevo León, Tamaulipas, Veracruz). |  (c) Keith, Eric - CC-BY-NC, permission granted to NCBG |
| Asteraceae | Simsia lagasceiformis | Waif on ore piles. | Native of sw. United States south to Mexico. |  (c) Roget, Leonel - CC-BY |