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Powder-back lichen
Physcia caesia
42.6675, 44.6158
Field Notes
Description:
Foliose light grey lichen (posy lichen in front in two first pics); becoming darker grey in the center, with visible soralia.
Habitat:
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.
Reference Links:
Physcia caesia - Wikipedia
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Spotted for Missions
Photographed
PublishedMay 9, 2019
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