Joe Walewski is the Director of Naturalist Training at Wolf Ridge Environmental Learning Center in Finland, Minnesota. He earned a B.S. in Fisheries and Wildlife Biology from Iowa State University and a M.Ed. in Environmental Education from the University of Minnesota Duluth. Every spring and fall, Joe leads Wolf Ridge graduate students on field botany excursions -- "Green Guys Hikes" -- with the intention of identifying all the green "guys" and "gals" in the woods. It was on one of these hikes in the early 1990s that Joe first included his beloved lichens. When away from work, Joe finds plent...