Abstract Thursday

This is one of the many mushrooms growing in my lawn. I actually mowed the lawn yesterday but left an area around the mushrooms 'because they were so pretty'. I then googled it and found that they are a sign of a healthy lawn so it they want to take over that area of the garden thats fine by me.
The theme today is filters.I was hoping to do something clever but resorted to the filter section of LunaPic and settled on 'Illusion' (who comes up with these names?).
I then went to google again. Typed in 'mushroom' and 'filter' and low and behold there is such a thing relating to cars. Who knew!