Image of rim lichen

Description:

Determination uncertain. Too many Lecanora-s and no microscopic investigation. Recognized by site only. Habitat: A group of trees in a meadow, close to mixed forest and a village, humid and relatively cold place, no insolation four months a year, precipitation ~3.000 mm/year, average temperature 7-9 deg C, elevation 370 m (1.200 feet), alpine phytogeographical region. Substratum: bark of Juglans regia, south exposed, ~1.5 m off ground.