I am trying to identify the attached growth. Is it a weed or type of grass? This growth appears in bunches (pattern is often a circle) developing on the partially shaded and inclined lawn. At the end of March, the spots look dead, like the color of hay. They can be pulled fairly easily and are low, like grass. In summer, the patches are a different color than my tall fescue. Attached are pictures take at various times of the year.