title: Dimelaena oreina
text: # Dimelaena oreina
  
  Dimelaena oreina, the golden moonglow lichen, is a greenish yellow placodioid lichen. The color of the greenish yellow thallus is derived from usnic acid in the cortex.
  
  ## Habitat and range
  
  The lichen grows on steep surfaces of hard siliceous rock from 400 to 2,800 metres (1,300 to 9,200 ft). It has a worldwide distribution outside the tropics, Australasia, and Antarctica. It is common in the Sonoran Desert of Arizona, California, Baja California, Baja California Sur, Sonora, Mexico, and Chihuahua, Mexico.
  
  