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Rhizocarpon geographicum Rhizocarpon geographicum growing on an exposed granitic (not true granite but a metamorphic rock with similar minerals) outcrop near Echo Lake in Minnesota. Echo Lake,Geotagged,Minnesota,Rhizocarpaceae,Rhizocarpon geographicum,Summer,United States,lichens,map lichen,rock outcrop Click/tap to enlarge Species introCountry intro

Rhizocarpon geographicum

Rhizocarpon geographicum growing on an exposed granitic (not true granite but a metamorphic rock with similar minerals) outcrop near Echo Lake in Minnesota.

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The Rhizocarpon geographicum

"Rhizocarpon geographicum" is a species of lichen, which grows on rocks in mountainous areas of low air pollution. Each lichen is a flat patch bordered by a black line of spores. These patches grow adjacent to each other, leading to the appearance of a map or a patchwork field.

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Similar species: Lecanorales
Species identified by Gary B
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By Gary B

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Uploaded Feb 26, 2019. Captured Jun 23, 2016 14:08 in Northeast St Louis, MN, USA.
country flag of United States of America Explore United States of America 39,926 9,640 8
  • Canon EOS DIGITAL REBEL
  • f/8.0
  • 1/1600s
  • ISO400
  • 100mm
Captured in the summer. More summer photos.

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