Inonotus obliquus Identity & Plant Part
The botanical entity is Inonotus obliquus (Fr.) Pilát, a fungus of the Hymenochaetaceae that grows on birch and other hardwoods in cold northern forests. The material used is the dried conk, sold as the mushroom body. Botanically the conk is a sclerotium, a hard mass of mycelium, and not a true fruiting body: the fertile form develops under the bark of the host and is rarely seen. Birch wood and loose bark are not part of this chaga mushroom extract.
Two confusions are common on the market. Some chaga products are grown as mycelium on grain, a different material from the conk, and poorly cleaned conk can carry wood and bark fragments.
The conk produces large amounts of melanin, which gives its black surface and the dark color of its extracts.












