What is Mycelium?
[[File:Mushroom's roots (mycélium).jpg|thumb|right|250px|Mycelium of a fungus]] [[File:20100815 1818 Mold.jpg|thumb|right|Microscopic view of a mycelium.&nbsp; This image covers a one-[[millimeter]] square]] The '''mycelium''' is the part of a [[fungus]] that is usually underground (or inside some another substance). It is composed of '''hyphae''', which look like threads, or [[root]]lets. The mat of hyphae may be very thickly woven. The fungus uses it to extract [[food|nutritient]]s. The hyphae are usually [[syncytium|syncytic]], that is, they do not have complete cell walls. Fungal colonies composed of mycelium are found in and on soil and many other natural materials. A mycelium may be tiny, forming a colony that is too small to see, or it may be extremely large and cover the floors of a large forest. The part of the fungus which is most visible is the [[reproduction|reproductive]] body. This is often, but not always, the stem and hat of the [[mushroom]]. {{Fungus}} {{biology-stub}} [[Category:Fungi]]