Chris Mattison / Lichen (Nephroma antarctica) Rio Serrano, Chile. Focus stacked image.
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Chris Mattison / Membranous dog lichen (Peltigera membranacea) growing amongst Ostrich-plume moss (Ptilium crista-castrensis), Ystradfellte, Brecon Beacons National Park, Wales, UK. October.
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Nick Upton / Blackthread lichen (Placynthium nigrum) with squamules of Bruised lichen (Toninia verrucarioides) growing on limestone rock, Cheddar Gorge, Mendip Hills, Somerset, UK, April.
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Staffan Widstrand / Wild Wonders of China / Tree lungwort (Lobaria pulmonaria) growing on tree in humid montane mixed forest, Laba He National Nature Reserve, Sichuan, China
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Adrian Davies / Dog lichen (Peltigera sp) Madeira.
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Nick Upton / Lungwort / Green satin lichen (Lobaria virens) on a treetrunk in ancient Atlantic woodland, Knapdale Forest, Argyll, Scotland, UK, May.
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Nick Upton / Lungwort / Green satin lichen (Lobaria virens) with apothecia fruiting bodies on a treetrunk in ancient Atlantic woodland, Knapdale Forest, Argyll, Scotland, UK, May.
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Nick Upton / Tree lungwort / Lung lichen (Lobaria pulmonaria) growing on a treetrunk in ancient Atlantic woodland, Knapdale Forest, Argyll, Scotland, UK, May.
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Nick Upton / Lungwort / Green satin lichen (Lobaria virens) with apothecia fruiting bodies on a treetrunk in ancient Atlantic woodland, Knapdale Forest, Argyll, Scotland, UK, May.
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Chris Mattison / Foliose lichen (Lobaria scrobiculata) on birch bark. Sensitive to pollution. Drumnadrochit, Inverness, Scotland
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Chris Mattison / Lichen (Lobariella sp), Sevegre National Reserve, Costa Rica. Focus-stacked image
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Nick Upton / Tree lungwort / Lung lichen (Lobaria pulmonaria) patch growing on a tree trunk in montane Laurel forest, Anaga Mountains, Tenerife, May.