Most mushrooms become unrecognizable once they have released their spores and begun to rot. Bacteria and fungi invade the mushroom and reduce it to a withered husk or a pile of goo. These hemlock reishi mushrooms Ganoderma tsugae* are very durable, and still identifiable by their color and structure, and by the fact that they are growing from dead hemlock trees.
* Shiny skin on hemlock