Yesterday, I transplanted a small piece of Carex pensylvanica, Pennsylvania sedge, from my sister's property in Ocean County, New Jersey. This species is common on her property.
She lives in the pinelands of New Jersey. The canopy is pine and oak. The duff layer - the natural "mulch" of dead plant material deposited on top of the soil - is composed of mostly pine needles, with some oak leaves.
Here's a view of the clump I extracted.