Chaga

Chaga, birch fungus [Inonotus obliquus (Pers.) Pil.] - wild plant. Dry extract of the fruit bodies of this fungus is used in chronic gastritis; the floor thick extract (befungin) - symptomatic tool in malignant tumors.
birch chaga mushroom
Fig. 77. Chaga, birch fungus (right - fruit body in section).