Tales From the Help Desk: Growths on Tree Bark

Q:  Something is growing on the bark of my tree.  Is that a problem? A:  It depends.  If it is flat and looks rather lacy, it’s lichen and does not harm the tree. If the growth on your tree bark is shaped like a shelf and looks like a mushroom, it is a conk. Conks indicate that the tree has internal decay. Lichen is a symbiotic relation between certain types of fungi and algae. They have a very shallow attachment...