?subterranean fungus

?subterranean fungus

Observation - ?subterranean fungus - UK and Ireland. Description: found about 20-25 cm deep in vegetable garden friable, sponge-like in texture. photos each show one piece from top, other from the bottom

found about 20-25 cm deep in vegetable garden
friable, "sponge-like" in texture.
photos each show one piece from "top", other from the "bottom"