Porpid tuberc441c.jpg

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Porpidia tuberculosa, some soredia mounted in K. The presence of confluentic acid is demonstrated by the production of numerous tiny oil droplets ('Fryday bubbles').

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith