Inonotus obliquus

Chaga, a reference photo
Photo: Tocekas · CC BY-SA 3.0 (licence)

Inonotus obliquus, commonly called chaga (; a Latinization of the Russian word ча́га), is a fungus in the family Hymenochaetaceae. It is parasitic on birch and other trees. The sterile conk is irregularly formed and resembles burnt charcoal. It is not the fruiting body of the fungus, but a sclerotium or mass of mycelium, mostly black because of a substantial amount of melanin. It is commonly marketed as a dietary supplement for various health benefits but lacks sufficient scientific evidence for safety or effectiveness, and quality can vary due to inconsistent processing and labeling.

From Wikipedia, under CC BY-SA 4.0.

Is it poisonous?

We have no record of Chaga being toxic, poisonous or venomous. That is not proof that it is safe. Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.

Classification

Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Hymenochaetales
Family
Hymenochaetaceae
Species
Inonotus obliquus

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