Acmella repens

Acmella repens is a North American species of flowering plants in the sunflower family. The plant is native to the southeastern and south-central United States, primarily in the coastal plain from Texas to North Carolina and in the lower Mississippi Valley from Missouri to Louisiana. There are additional populations in Coahuila in northeastern Mexico.

References 

repens
Category:Flora of the Southeastern United States
Category:Plants described in 1788
Category:Flora of Texas
Category:Flora of Missouri
Category:Flora of Coahuila