the mushroom may grow next to other mushrooms but not on top of them.
Two may decide to grow along side one another. they may lean so close that it seems their base is one, but still each stands level but seperate on the same ground.
look even closer and the individual mushroom is, itself, a relationship of its own.
each mushroom, from stem to cap, is a population of individual and free single celled organisms who bond together for strength and structure, to abet the survival of all.