Physconia enteroxantha - Medulla yellowish and K+ y
Physconia enteroxantha - Medulla yellowish and K+ y
Melanohalea exasperatula - Negative reactions, distinctive isidia
Cryptolechia carneolutea - Negative reactions, white thallus, similar to Dimerella but with white thallus
Schismatomma cretaceum - K+ y, UV± pale grey
Ochrolechia turneri - Soralia C+ y, KC+ o, UV+ glaucous
Punctelia borreri - Medulla C+ pink
Ochrolechia arborea - UV+ y but watch out for Pycnora sorophora also UV+ y
Micarea denigrata - Apothecia C± orange-red in section
Chaenotheca trichialis - contains Stichococcus photobiont