Native warm-season grasses (nwsg) are grasses historically native to an area that grow during the warm months of the year and are dormant during autumn and winter. They differ from cool-season grasses, which make their active growth during spring and fall. There are many warm-season grasses native to the Mid-South region; however, seven species are most commonly promoted as cover for wildlife and/or forage for livestock. These are big bluestem, little bluestem, broomsedge bluestem, indiangrass, switchgrass, sideoats grama and eastern gamagrass. Not all of these, however, have the same quality for wildlife habitat or livestock forage. For example, broomsedge offers excellent nesting habitat for bobwhites, but poor forage for livestock.
"PB1746 A Landowner's Guide to Native Warm-Season Grasses in the Mid-South," The University of Tennessee Agricultural Extension Service, 05-0026 PB1746-35M-12/04 E12-4915-00-006-05, http://trace.tennessee.edu/utk_agexfora/2