Sabatia brevifolia

Sabatia brevifolia, commonly known as shortleaf or short-leaved rose gentian (or rose-gentian), narrowleaf or narrow-leaved sabatia, white marsh-pink or white sabatia, is a species of flowering plant in the genus Sabatia and the family Gentianaceae. It is an annual that grows in moist flatwoods and savannahs. It grows from 1-3 feet tall and the flowers have five white petals with pointed tips.
It grows in the United States, in the states of Florida, Georgia, South Carolina, and Alabama.