Those are the FRUITING BODIES, They will dry up and turn into millions of spores. Then these spores are blown far and wide, carried by animals and birds, on peoples shoes, whatever. These fungal spores are then in the soil and doing what they do, breaking down organic matter. In time they to will send up fruiting spores. Do you have weeds anywhere in your lawn or garden. You didn't plant the weed seeds did you?Thx for the reply Chuck. How did they start growing when I never planted them?