Beech is a preferred host for the Oyster Musroom, ๐๐๐๐ข๐๐๐ก๐ข๐ ๐๐ ๐ก๐๐๐๐ก๐ข๐ .
Although this one is slightly paler than usual, the decurrent gills are textbook. They run down the stem to the point of attachment. Next time youโre in Delhaize (other supermarkets are available), have a look.