Catillaria nigroclavata

Catillaria nigroclavata is a species of lichen belonging to the family Catillariaceae. It is mainly found in Europe and North America but it has also been reported from other continents. Catillaria nigroclavata is an epiphyte which grows on the bark of trees. A study from Greece reported the lichen from near the Fethiye mosque in Ipeiros and Kos Island where it was found growing on the species Pinus pinea and Robinia pseudacacia, on the latter of which it grew alongside the lichen Hyperphyscia adglutinata....read more on Wikipedia.