title: Umbilicaria crustulosa
text: # Umbilicaria crustulosa
  
  Umbilicaria crustulosa, the crusty navel lichen, is a lichen of the genus Umbilicaria in the family Umbilicariaceae.
  
  ## Distribution
  
  This species is present in Arctic, Europe, temperate and tropical Asia, Africa and North America. It grows on rocks.
  
  