Heppia conchiloba
Heppia conchiloba is a gray to light brown squamulous to foliose terricolous lichen that occurs in southwestern deserts of North America. The surface appears as if covered in a light dust. The squamules are peltate, up to 8 mm in diameter. There are one to several apothecia per lobe, with reddish-brown urn-shaped to concave discs, immersed so as to appear like concave spots. Lichen spot tests are all negative. Its entire thallus body is deeply convex, and it is different in color from other members of Heppia and or Peltula, which are olive or brownish-olive.