It's coming up in small scattered clumps. Fairly easy to pull individually, just a lot of it. We've had several weeks with no rain recently in North Texas, and lawn was under some stress, started seeing this coming up across a large expanse of hybrid bermuda the past couple weeks, especially after finally getting some rain. Just kind of speckled the lawn with it in some places. Color is more blue-ish green than the bermuda and stands out. Have never seen it before that I recall. What is it, and how best to deal with it?