The photo was taken by a student, Alliana Munguia, at Cathedral City High School during a lichen study in Joshua Tree National Park. She came up with the idea of using a smart phone camera to take pictures through a loupe or a magnifier.
The yellow lichen is Acarospora socialis. The orange-yellow one (not much) is a Candelariella, mostly likely Candelariella aurella. – Kerry Knudsen, Lichenologist, UCR.
Responses from readers:
a. hernandez: The photo shows lichen with a ruler next to it.
Erik Cross: Ahhh the ever mysterious lichen, not sure which species though.