While sedges are more typically found in wet or moist areas, this particular species grows in dry upland limestone areas. It’s a fairly common plant in the more shaded parts of the barrens.
When it grows in colonies, a thick mat of wiry leaves develops. Older plants usually show a mix of dead leaves among the new green leaves, but the green color prevails for most of the year. This clump looks as though someone sank into the ground and left only their hair exposed. I can imagine the whole clump turning to reveal a dirty face.