I have seen this grass in many coastal areas of South Florida. The grass in the picture was found in West Palm Beach. It looks similar to bermuda grass but is much coarser. The blades are almost sharp at the ends and are very stiff. I have found it in full sun as well as nearly full shade. I have even seen it growing on the beach. It does not look like it was planted as grass but forms dense turf in some areas and even creeps up the bases of palm trunks with its stolons.