Lecanora cenisia morph melacarpa

Differs from the type by its apothecia with a blackish to black disc.

 N.B. Easy to confuse with:

 _  Lecanora gangaleoides which is K+ yellow and has a less gray-blue thallus.

 _  Tephromela atra with a whiter thallus and K+ yellow.

 _  Lecanora praepostera with a K+ yellow then red thallus (but not blood red).