Lecidea atrobrunnea

Lecidea atrobrunnea is a crustose lichen in the Lecideaceae family, found in mountains of the continental western United States and Alaska.^[1][2][3] 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.^[3]:8 It appears black from a distance, but brown up close.^[3]:8

It varies greatly in its overall appearance from colony to colony.^[2] L atrobrunnea subsp. atrobrunnea has been found to be common in very common in high montane zones and alpine zones.^[2] L atrobrunnea subsp. saxosa ("saxosa" meaning "rock") has been found in high elevations in the San Francisco Peaks and San Bernardino Mountains.^[2] The prothallus and apothecia are black, while the thallus areoles are brown. "Atro" is from Latin for "black" and "brunnea" for "brown". It was named by Ramond.^[2] The upper surface is usually pale to dark reddish brown in the center of areoles. In squamulous specimens, the lower surface can be seen, and is shiny and dark.^[2]

It is commonly found on rock faces in the Sierra Nevadas.^[3] The communities often completely cover the exposed surface of the rock, or form intricate multicolored mosaics with other lichen communities.^[3]:8 It's communities are park of the aesthetic appeal to visitors of Yosemite National Park and Sequoia National Park.^[3]:8

It is found in the Rocky Mountains, including in alpine zones, and in the United States Sierra Nevada range.^[1][3] Lichens in relation to management issues in the Sierra Nevada national parks, McCune, B., J. Grenon, and E. Martin, L. Mutch, Sierra Nevada Network, Cooperative agreement CA9088A0008. Oregon State University, Corvallis, Oregon, and Sequoia and Kings Canyon National Parks, Three Rivers, California.^[4]:8 It tightly adheres to the rock faces giving it the appearance of being painted on.^[3]:8

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