Smooth Rock Tripe - Umbilicaria mammulata
Large, foliose lichen that was very pale green on top and black underneath.
*U. mammulata is one of the largest lichens in the world. The thallus can be up to 15cm in diameter.
Habitat: Covering rocks in a deciduous forest
''Umbilicaria mammulata'', or Smooth Rock Tripe, is a foliose lichen found on boulders and rock walls.