Candelariella aurella

Candelariella aurella (Hidden goldspeck lichen, eggyolk lichen) is a yellow crustose lichen in the (Candelariaceae )) family. It is commonly found on calcareous rock or wood or bark exposed to sunlight and which may have calcareous dust in areas with lime soils. The thallus is areolate with scattered small (0.1 - 0.3 mm), rounded to elongated yellow areolas. It has a global distribution and occurs on limestone and calcareous sandstone in the Sonoran Desert in Arizona, California, and Baja California. It occurs in Joshua Tree National Monument.