| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Asteraceae | Cirsium horridulum var. horridulum | Common Yellow Thistle, Bull Thistle | Roadsides, woodlands, pine savannas. | ME south to FL, west to TX, mostly on the Coastal Plain and adjacent provinces; also Mexico and Bahamas. |  |
| Asteraceae | Cirsium horridulum var. megacanthum | Bigspine Thistle | Moist ground. | AL and Panhandle FL west to TX and OK. | |
| Asteraceae | Cirsium horridulum var. vittatum | Southern Yellow Thistle, Pineland Thistle | Wet pine savannas. | Se. NC south to s. peninsular FL and Panhandle FL, west to s. MS and e. LA; Bahamas; West Indies. |  |
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