Physcia caesOln.jpg

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Physcia caesia, a specimen much modified by infection with Polycoccum pulvinatum, which causes the production of gall-like structures and the suppression of soralia formation.

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