Common map lichen (Rhizocarpon geographicum) growing at about 900 meters elevation at Knaben (Agder, Norway).

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Photo credit: © Alf Jacob Nilsen / Alamy / Afripics
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Keywords: 2013, ascomycota, fungi, geographicum, kanben2013, kartlav, lav, lecanoromycetes, lichen, lichens, map, rhizocarpaceae, rhizocarpales, rhizocarpon, vanlig