Carex brevior. Plains Oval Sedge also called Shortbeak Sedge is a hardy, versatile plant that can grow in a variety of conditions. It is most commonly found in dry, disturbed areas, but it can also adapt to wetlands and seasonally flooded sites such as swamps and floodplains. It actively grows during the spring and fall when soil temperatures are cool, like most sedges (cool-season growers).This sedge is drought tolerant and can tolerate controlled burns.
 
Plant information from Prairie Moon Nursery.