"Felt Lichen or Freckle Pelt" (Peltigera aphthosa)
Freckle pelt changes from a dull gray-green to bright green, when wet. The brown to black dots on the upper surface contain tiny colonies of cyanobacteria, which supply the lichen with nitrogen.
Felt Lichen is forage for mountain caribou during the winter.
In ages past, in Scandinavian countries, this lichen was boiled to make a wash for chapped skin on feet and for diaper rash.
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