Mycellia are a vital part of the health of your trees. They contribute to the health and well being of row crops too.
Mushrooms are only the fruiting body of mycellia networks, at work in your garden.
They will not hurt your garden. If their apearance ofends your esthetic, please know they are trasitory and will pass away in a few days. You can pick and compost them if they make your garden look untidy.