The lichen Lasallia pustulata (Rock Tripe) is found on nutrient-enriched rocks in western, upland regions. This picture was taken in Snowdonia.

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Photo credit: © Peter Martin Rhind / Alamy / Afripics
License: Royalty Free
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Keywords: areas, lasallia, lichen, north, nutrient-enriched, pustulata, rock, rocks, snowdonia, tripe, umbilicariaceae, upland, wales, western