ID warm season grass
I am trying to ID the warm season grass in my backyard. I would think it's Bermuda grass like my front yard, but the leaves are less bent and it doesn't seem to put out above ground runners. However it does spread underground d to previously grass free regions. I think it's too thin to be St. Augustine, Centipede or Zoysia? Here it is pictured below. The yard is ~50% shade, heavy clay and acidic.