Not satisfied at all with this determination. This actually keyed out snugly to Carex panicea, which is unknown in Ohio. Abandoning this lead, I was left with Cx meadii or Cx tetanica, which are difficult to separate. Cx meadii is known to occur in dry or wet prairies, while the only time I've run into Cx tetanica was in a bog.

Infrequent in disturbed wet prairie; culms arising singly, bases pale brown.