| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Asteraceae | Xanthium ambrosioides | On ballast. | Allegedly native of South America. | ||
| Asteraceae | Xanthium chinense | Cocklebur | Barnyards, pastures, bottomlands, other disturbed areas. | Widespread in e. North America, and now nearly cosmopolitan; its original distribution uncertain. Despite the name, this species is likely native to e. North America. |  |
| Asteraceae | Xanthium echinatum | Cocklebur | Dunes, beaches. | VA northwards along the coast. |  |
| Asteraceae | Xanthium orientale | Disturbed ground, roadsides, pastures, barnyards. | Widespread in e. North America, and now nearly cosmopolitan; the details of its original distribution uncertain. |  | |
| Asteraceae | Xanthium speciosum | Disturbed areas, prairies, roadsides. | MN to SD, south to MO, OK, TX, and Mexico. | ||
| Asteraceae | Xanthium spinosum | Spiny Cocklebur | Fields, disturbed ground. | Apparently native of South America. |  |
| Asteraceae | Xanthium strumarium | European Cocklebur | Ballast, waste areas near ports. | Native of Europe. |  |
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