Scleria pauciflora

Scleria pauciflora, known as few-flowered nutrush, papillose nut-sedge, and Carolina-whipgrass, is a plant in the sedge family (Cyperaceae) native to northern Mexico, the eastern United States, southern Canada, and Cuba. It is common across a broad stretch of the southeastern United States in many different habitat types, becoming rare at the northern end of its distribution. It has been observed to occur in habitats such as pine savannas, wet and dry pine flatwoods, slashpine woods, and along boggy riverbanks....read more on Wikipedia.