Mouse-Ear Chickweed is a perennial that becomes a serious problem in lawns. It flowers in early spring and is very unsightly. The name is derived from the shape and texture of the leaf. If you are too timid to get close enough to a mouse to see what it's ear looks like, look at this leaf. They are similar except for the color.
Photo by Dr. John Meade, weed scientist emeritus
Rutgers NJAES Cooperative Extension