Inland sea oats (Chasmanthium latifolium)
One of the few native grasses that loves the shade. Inland sea oats has a beautiful flat wheat-like inflorescence in the late summer, turning straw colored in the fall and persisting through the winter. Grows about 3' tall and will seed around to fill an area; don't water or put it in rich soil unless you want a lot of it. Rustles in the breeze, making you feel cooler in the summer.