Tinder Fungus
True Tinder fungus, Inonotus Obliquus, AKA Chaga. This is parasitic growth common to birches that may develop at the site of an injury to the tree such as a broken limb. This fungus has a blackened, charred looking exterior with an interior the color of buckskin and consistency of cork. The interior of this fungus makes remarkable tinder that is difficult to extinguish once ignited. The ease with which tinder fungus ignites varies with its texture. Learn to search out the best fungus for your fire piston by testing it with a thumbnail. Soft, spongy feeling tinder fungus ignites most easily and also works very well with traditional flint and steel. Harder, woody tinder fungus is best reserved for use with fire by friction methods. It requires no special treatment other that drying.