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Crusty navel lichen (Umbilicaria crustulosa) on an acid rock-face in the Pyrenees Andorra by BOB GIBBONSSCIENCE PHOTO LIBRARY
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Cladonia diversa red-tipped lichen growing on heathland Dorset UK by BOB GIBBONSSCIENCE PHOTO LIBRARY
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Lichen growth on branch particularly Ramalina fastigiata and Usnea spp by BOB GIBBONSSCIENCE PHOTO LIBRARY
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