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Grey-green thallus with slightly brown raised encrustations in the centre.
fallen branch of a silver birch tree
I am unsure if this is related to other spottings, as they were all found on the same branch http://www.projectnoah.org/spottings/936... http://www.projectnoah.org/spottings/937... if they are related and just different stages, I'd welcome any comments - thanks!
Spotted on Mar 5, 2012
Submitted on Mar 6, 2012