Mushroom = Sporocarp = Fruiting body
Photo Credit: ©Nathan R. Thorp
These mushrooms fruit abundantly in the warmed enclosures and are likely formed by the ectomycorrhizal fungal genus Laccaria or by the saprotrophic genus Galerina.
How does a mushroom grow below the moss carpet? In the SPRUCE bog, some mushrooms develop under the moss carpet from a tiny pinhead called a primordium. The primordium is formed within the fungal mycelium.