Birch bracket fungi on a fallen birch tree.
seen from China
seen from United States

seen from United States
seen from United States

seen from United States
seen from Malaysia

seen from Canada
seen from Ecuador
seen from United Kingdom

seen from China

seen from Australia

seen from Brazil
seen from United Kingdom
seen from Poland

seen from Greece
seen from United States
seen from United States

seen from Spain
seen from Russia
seen from United States
Birch bracket fungi on a fallen birch tree.
Fomitopsis betulina
This common bracket fungus, the birch polypore or razor strop, is widespread throughout the northern hemisphere and the main cause of brown rot on birch (Betula sp.) trees. It is well known due to its long history of traditional uses and pieces of it were found among the belongings of Ötzi the Iceman, a mummified man who lived over 5000 years ago and was found in the Alps between Italy and Austria in 1991. The birch polypore is edible when young, but it has mostly been used for its medicinal value, supported by modern pharmacological research which has highlighted a wealth of possible further uses. From wound dressing to brewing as tea, its antibacterial, anti-inflammatory, antiseptic and analgesic properties made it a valuable species in the folk medical practices of Europe from antiquity up until modern times. Maybe less importantly, it has also been used to refine the sharp edge of razors, which gave it the common name ‘razor strop’.
Interesting further reading from the World Journal of Microbiology and Biotechnology
Birch Polypore, Piptoporus betulinus (by me)
Fomitopsis betulina aka birch polypores wearing snow hats in December.
Merry Christmas and Happy Holidays from @lindagoesmushrooming !
Fomitopsis betulina (Birch polypore)
Fomitopsis betulina | Birch Polypore