Andropogon ternarius

About

Anatherum ternarium is a species of grass with the common names split bluestem, splitbeard bluestem, silver bluestem, and paintbrush bluestem. It is native to the southeastern, east-central, and south-central parts of the United States, where it occurs from New Jersey south to Florida and west to Kansas, Oklahoma, and Texas, and into northeastern Mecixo.

Summary from Wikipedia