Lecidea atrobrunnea is a crustose lichen in the Lecideaceae family, found in mountains of the continental western United States and Alaska. With other lichen communities, it forms dark vertical drip-like stripings along drainage tracks in the rock faces, resulting in Native Americans giving the name "Face of a Young Woman Stained with Tears" to Half Dome.:8 It appears black from a distance, but brown up close.:8
Baltzo, "Lichens of Mt. Diablo State Park", 1989. Notes: Shiny red brown thallus, areole squamules thin to thick and convex; waxy epicortex is thin; cortex UV+ yellow cream; medulla I+. Apothecial discs smooth in appearance. Similar to Rhizocarpon bolanderi, which is UV- and has much smaller areole and rough apothecial discs. On shale.
-Collection Herre, 1930.
-Collection Herre, 1930.