Andropogon, also known as bluestem. The Andropogon grasses are from the tallgrass prairie;Andropogon gerardii has been the dominant grass. They are warm season clumping grasses. It is hardy, as well as supplying decent nutritional value to the animals that grazed it.
Varieties:
Andropogon gerardii (big bluestem, turkeyfoot) leaves are blue/green, turn orange/copper/pink with first frost, 5-6' flowers are reddish, 6-8' tall zone 3
Abdropogon scoparius (little bluestem) leaves are blue/green, turn orange/copper/pink with first frost, 2-3' tall flowers are delicate creamy white, 4' tall zone 3