I am not sure why or where, but I think I was once told it is a type of sedge... I have some on my place, if it's the same stuff. Grows in a dense clump in not so great of soils. Never looks really healthy, but never looks entirely dead either...
Am going back through some old posts on ID. If it is green in the dead of winter in Kansas then a sedge is a good deduction and the plants do resemble sedge growth form. There are hundreds of sedges and they are hard to nail down to specific. Many sedges are semi-evergreen which gives them a good advantage for grazing animals. Deer definitely do eat some kinds of sedges and turkey and other birds eat the seedheads. They are often but not always understory and many are found in moist locations.