Bracket Fungus on Birch

Observation - Bracket Fungus on Birch - UK and Ireland. Description: Large (4 x 3)bracket with horizontal concentrically ringed upper surface in varying shades of dark brown, red brown and pale brown, and oblique pale brown undersurface with parallel slots (resembling gills but bifurcating and anastomosing), attached by b

Large (4 x 3")bracket with horizontal concentrically ringed upper surface in varying shades of dark brown, red brown and pale brown, and oblique pale brown undersurface with parallel slots (resembling gills but bifurcating and anastomosing), attached by broad base