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Crustose yellow-green lichen with black apothecia, often found growing just next to another lichen, looking exactly similar except for the colour (white - off white). Areolas flat and angular, about 3 - 5 mm large, with black angular apothecia occurring inserted inside areolas or in cracks. There is often a layer of black spores on edges.
Seen growing on bare rocks, in a midst of other lichens, a multitude of them. Seen on slopes of one of the lower peaks of Caucasus, at some 2200 - 2300 m of altitude, and in an adjacent valley, laying at some 1900m. The valley and these slopes are regularly beaten by harsh winds, and are intermittently covered by coniferous groves, thorny shrub groves, mountain grasslands and barren rocks.
The rocks in this place were really rich in lichens - I'm only attacking the collection of shots, and have already counted (but not yet identified) over 20 differents ones...
Spotted on Apr 20, 2019
Submitted on May 6, 2019