The New Student's Reference Work/Mycelium

Mycelium (mī́-sē′ lĭ-ŭm), (in plants), the ordinary body of a fungus, consisting of branching, colorless threads more or less interwoven.  Sometimes the threads are so loosely interwoven, that the mycelium resembles a delicate cobweb; at other times so closely, that the mycelium becomes a felt-like mass.  The latter form of mycelium may often be seen upon preserved fruit or jelly, in which case it can be removed like a thick piece of felt.  See Fungi.