Candelariella vitellina, section of apothecial margin mounted in K. Note the presence of a reddish pigment (the cause of a 'K+ reddish' colour change of the apothecial margin usually observed in this species).
Scratchpads developed and conceived by (alphabetical):
Ed Baker,
Katherine Bouton
Alice Heaton
Dimitris Koureas,
Laurence Livermore,
Dave Roberts,
Simon Rycroft,
Ben Scott,
Vince Smith
