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Smooth Rock Tripe Large, brown foliose lichen with a black lower surface. It turns green when it gets wet. <br />
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U. mammulata is one of the largest lichens in the world. The thallus can be up to 15cm in diameter.  The one in this photo was about 8 cm wide. Geotagged,Smooth Rock Tripe,Spring,Umbilicaria mammulata,United States,fungus,lichen,tripe Click/tap to enlarge

Smooth Rock Tripe

Large, brown foliose lichen with a black lower surface. It turns green when it gets wet.

U. mammulata is one of the largest lichens in the world. The thallus can be up to 15cm in diameter. The one in this photo was about 8 cm wide.

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''Umbilicaria mammulata'', or Smooth Rock Tripe, is a foliose lichen found on boulders and rock walls.

Similar species: Umbilicariales
Species identified by Christine Young
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By Christine Young

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Uploaded Apr 5, 2018. Captured Mar 31, 2018 12:58 in 80 Main St, Sharon, CT 06069, USA.
  • Canon EOS 80D
  • f/5.6
  • 1/166s
  • ISO400
  • 100mm