Hello everyone, I'm new to the site! Hopefully someone can come up with a solution to my problem. This early spring I noticed these large brown patches popping up in my field here in Haslet Tx. I have included a few pictures below. The tips of the grass have this dark red tent to it. Some of the grass is kinda stringy. I don't fertilize my field, just mowing only around 4" every 2-3 weeks. Now it's fall and ONLY the areas that had the brown patches this spring and summer are now growing this long brown looking weed. Can anyone identify what this is?