Inonotus

Inonotus obliquus

Inonotus obliquus (Fr.) Pilat.
Engl.: clinker polypore, birch clinker, chaga.
Sven.: sprängticka.
Bot. syn.: Polyporus obliquus (Fr.) Fr., Poria obliqua (Fr.) Karst.

I have no articles for this botanical term, but there might be some for the next level down (if found).