1) Andropogon furcatus 2) Andropogon gerardii 3) Blue stem 4) Forage grass 5) Grass 6) Prairie grass used for forage 
any of the approximately 200 species of perennial, sometimes tufted grasses in the genus Andropogon (family Poaceae), distributed throughout the ...
[n] - tall grass with smooth bluish leaf sheaths grown for hay in the United States
blue stem noun tall grass with smooth bluish leaf sheaths grown for hay in the United States