This is one of my favorite native grasses, Eastern gamagrass. It's a fairly large clumping grass up to about waist height. If you look carefully at the inflorescenses, you might figure out that it's a close relative of corn (Zea sp.), which is native to Central America. Just like maize, the flower sexes are separated along its inflorescenses; the "male" flowers are at the top and the "female" flowers are at the base. Eastern gamagrass grows throughout the Texas prairie area. I belive this grass would make a great addition to a native landscape because it's pretty well behaved and naturally tidy in appearance.