Is this OK for Lecanora sinuosa?
It was on a youngish carpark Ash next to Bristol floating harbour.
K+ yellow, Pd-.I would interpret the crystals of the epithecium as being small and descending between the paraphyses. They are soluble in K.
I only took a little bit, and there were no good asci with mature spores in the two fruit I have examined.
By the way, thanks Neil for the posting of all the Lecanora chlarotera look-alikes. Very worrying!
Juliet