Pertusariaceae Ochrolechia subviridis Growth type crustose Chemical results: Isidia K-, C+ orange > red, KC+ red, P-, UV+ glaucous Found on nutrient-rich bark of mature, well-lit deciduous trees Pale grey thallus, can be completely covered by the branched or cylindrical isidia. Apothecia are very rare. Similar: Phlyctis argena and Ochrolechia turneri are C-. The thallus of Pertusaria coccodes is K+ orange > red

Ochrolechia subviridis
Arne, Dorset. February 2014