1. 

   Richard E Masson Active Member 10 Years

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   Location:

   Edenbridge,Kent England

   The photo shows the stump of an old Oak or Ash tree in a field, near a stream, after days of rain. Location: Edenbridge, Kent England.
   My question is, what causes the beautiful orange colouring?

    

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   Richard E Masson, Nov 2, 2023

   #1
2. 

   Daniel Mosquin Paragon of Plants UBC Botanical Garden Forums Administrator Forums Moderator 10 Years

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   Location:

   Vancouver, British Columbia, Canada

   I am fairly certain these will be a species of Trentepohlia, a green alga: https://www.naturespot.org.uk/species/trentepohlia-sp

    

   Daniel Mosquin, Nov 2, 2023

   #2

   Jeremy Cohen likes this.

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