Heppia conchiloba

Heppia conchiloba (common soil ruby) is a gray to light brown squamulous to foliose terricolous (grows on soil) lichen that in southwestern deserts of North America. The surface appears as if covered in a light dust (pruinose). The squamules are peltate (like shields attached from the lower surface), up to 8 mm in diameter. There are one to several apothecia per lobe, with reddish-brown urn shaped (urceolate) 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.