Lichen

Some of our local Lobaria pulmonaria absolutely thriving in an old growth park. The park is full of these large, gnarly old birch trees and many of them have these massive colonies growing on them. They don't always look like much when desiccated but if you catch them after a rain storm they are stunning. I've read that L. pulmonaria has to live to an age of about 25 years to be able to produce propagules.