| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Asteraceae | Carduus acanthoides ssp. acanthoides | Plumeless Thistle, Broad-winged Thistle | Disturbed areas, pastures. | Native of Eurasia. |  (c) Fleming, Gary P. |
| Asteraceae | Carduus crispus | Welted Thistle | Disturbed areas, naturalized around large ports. | Native of Eurasia. | |
| Asteraceae | Carduus nutans | Nodding Thistle, Musk Thistle | Fields, roadsides, disturbed areas. | Native of Eurasia. |  (c) Fleming, Gary P. |
| Asteraceae | Carduus pycnocephalus ssp. pycnocephalus | Italian Plumeless-thistle | Pastures and disturbed areas; in waste areas around wool-combing mill, ballast waif. | Native of n. Africa and w. Asia. Scattered occurrences in e. North America, including old ballast collections (FNA). Reported for SC by Nesom (2004d). |  (c) Sorrie, Bruce A. - CC-BY |
| Asteraceae | Carduus tenuiflorus | On ballast, waif with collections from se. PA from 1877-1879 (Rhoads & Klein 1993) and from NJ (Kartesz 2020). | Native of s. Europe. |