Birch Woodwart

Birch Woodwart produce irregular hard, black warty growths, which house tiny fruiting bodies. They vary in shape from round and cushion-shaped to elongated and generally grow out of fissures in the the bark.

When they first appear they are a rusty-red colour. They then turn brown-black or black and are dotted with raised pores.

It appears all year round on dead trunks and branches of Birch, but can be found on dead wood of other deciduous trees.

It is widespread and common.