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
