| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Asteraceae | Simsia calva | Awnless Bush-sunflower | Prairies, roadsides, scrub. | C. TX, NM, and AZ south to Mexico (CHH, COA, NLE, TAM, VER). |  |
| Asteraceae | Simsia lagasceiformis | Waif on ore piles. | Native of sw. United States south to Mexico. |  |