Some guys I ride with have been collecting Chaga Mushrooms during our bike rides. Apparently, there are lots of medicinal uses to this thing. It looks like a chunk of charcoal and typically grows on Birch trees. They caught my attention when I read you could use it as a firestarter. Anyone ever hear of such a mushroom and actually use it as a firestarter? See link: http://www.survivaltopics.com/survival/the-chaga-natures-medicinal-mushroom/ or google it.