Sheathed woodtuft

The sheathed woodtuft (Kuehneromyces mutabilis), also called the two-toned pholiota or, in German, Stockschwämmchen, is a small tawny wood-rotting mushroom that fruits in dense tufted clusters on the stumps and fallen trunks of broadleaf trees across Europe and temperate Asia. It is a well-regarded edible with a mild, savoury flavour and is one of the few wild fungi also cultivated on logs and sawdust blocks. But it is best known — and most feared — as a near twin of the deadly, amatoxin-bearing funeral bell (Galerina marginata), which grows in the same clustered, wood-borne habit, so it is a mushroom recommended only to foragers confident of every identification character.