n.
Mass of branched, tubular filaments (hyphae) of fungi (see fungus ) that penetrate soil, wood, and other organic matter.
The mycelium makes up the thallus (undifferentiated body) of a typical fungus. The mass may be microscopic in size or developed into visible structures, such as brackets, mushrooms , puffballs , or truffles . The mycelium produces spores , directly or through special fruiting bodies.