| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Polemoniaceae | Phlox drummondii var. drummondii | Wilcox Phlox | Open areas. | Endemic to se. TX. | |
| Polemoniaceae | Phlox drummondii var. mcallisteri | McAllister's Phlox | Prairies. | Sc. OK south to c. TX. | |
| Polemoniaceae | Phlox drummondii var. peregrina | Annual Phlox, Drummond Phlox | Dry sandy soils of roadsides, fields, disturbed areas. | S. OK south to s. TX, eastwards as an escape from horticultural use. |  |
| Polemoniaceae | Phlox drummondii var. tharpii | Tharp's Phlox | S. TX. |