Fungus in lawn??

Can anyone identify this fungus that has appeared in several areas of both my front and back lawn?

 

Looks like the Lichen which was identified for me as Dog lichen, Peltigera sp.
Dog lichen is a result of poor growing conditions for grass. As it is not a weed, there are no chemical weed killers which will control it. However, it is not very tolerant to changes in growing conditions, so simply improving the soil will have a dramatic effect and discourage the lichen from growing and spreading.