Helianthus debilis

Helianthus debilis is a native sunflower common on the Texas coast that can become a dense groundcover. Its rich yellow flowers often rise on solitary stems. Small yellow disc florets dot the dark brown head of the flower. The foliage, which appears in whorls, is highly variable in shape.

References

Duncan, W. H., & Duncan, M. B. (1987). The Smithsonian guide to seaside plants of the Gulf and Atlantic coasts from Louisiana to Massachusetts, exclusive of lower peninsular Florida. Washington, D.C: Smithsonian Institution Press.