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Lovely picture !
A lichen ménage à trois - http://science.sciencemag.org/content/353/6297/337
Some say it's time to throw the textbook understanding of lichens out the window.
"Now there will be more chaos, more confusion in lichenology ,...."
Lat/Lng: 53.6277262, -2.6472392
OS grid ref: SD572147