Major graminoid species in pastures, in order of abundance, were big bluestem (Andropogon gerardii Vitman), indiangrass [Sorghastrum nutans (L.) Nash], little bluestem [Schizachyrium scoparium (Michx.) Nash], sideoats grama [Bouteloua curtipendula (Michx.) Torr.], and switchgrass (Panicum virgatum L.; Towne and Owensby, 1984).