Letharia, or Wolf Lichen growing on a tree in Yosemite National Park, California, USA.

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Photo credit: © ASHLEY COOPER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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Keywords: america, american, attraction, california, conifer, country, escape, forest, green, landscape, letharia, lichen, light, lime, moss, mountain, national, nature, park, pine, reindeer, states, sunlight, tourist, tree, trunk, united, usa, wolf, woodland, yosemite