Belongs to: bracket fungi

Birch polypore Piptoporus betulinus

Also known as: razorstrop fungus


Best time to see: all year

Key facts

A bracket fungus commonly seen on dead or dying birch stems

Young growth is white and kidney-shaped, becoming greyish-brown with age, up to 25cm across

Its tough flesh was used as tinder and to sharpen blades

  • Main photo

Photo © Tony Gunton