 Cladonia lichen at the foot of granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Yellowish dust-like lichen at the foot of granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Some grey folios lichen at the foot of granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Yellow map lichen (Rhizocarpon geographicum) at the foot of granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Dark brown Acarospora(?) lichen at the foot of granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Crater lichen Diploschistes scruposus at the foot of granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Yellowish dust-like lichen Trapeliopsis(?) at the foot of granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Black hair like velvet lichen Cystocoleus ebeneus or may be Ephebe lanata at the foot of granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Buellia(?) lichen on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Some black Buellia(?) lichen on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Some brown Acarospora(?) lichen on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Black Lecanora like lichen on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Crater lichen Diploschistes scruposus together with dark-brown lichen on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Crater lichen Diploschistes scruposus on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Thick crust of some greenish lichen on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Black apothecia of Lecanora like lichen on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Some grey sorediate Parmelia(?) lichen on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Close up of crater lichen Diploschistes scruposus on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Small foliose lichen Cladonia incrassata(?) on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Salted shield lichen (crottle, Parmelia saxatilis)(?) on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Road at foot of granite cliff in Monrepos Park in Vyborg. Russia, May 24, 2019
 Song of Vainamoinen sculpture below granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Diploschistes lichen on granite in Monrepos Park in Vyborg. Russia, May 24, 2019
 Yellow map lichen (Rhizocarpon geographicum) on granite in Monrepos Park in Vyborg. Russia, May 24, 2019
 Yellowish dust-like lichen on vertical granite surface in Monrepos Park in Vyborg. Russia, May 24, 2019
 Crater lichen Diploschistes scruposus on a granite cliff in Monrepos Park in Vyborg. Russia, May 24, 2019
 Green Cladonia(?) lichen at the base of a pine below cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Salted shield lichen (crottle, Parmelia saxatilis) on granite in Monrepos Park in Vyborg. Russia, May 24, 2019
 Granite grotto in Monrepos Park in Vyborg. Russia, May 24, 2019
 Brown crustose lichen on a granite shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Yellow map lichen (Rhizocarpon geographicum) and another crustose yellow lichen on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Trumpet like Cladonia lichen in moss in Monrepos Park in Vyborg. Russia, May 24, 2019
 Grey crustose lichen Aspicilia on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Close up of yellow map lichen (Rhizocarpon geographicum) in Monrepos Park in Vyborg. Russia, May 24, 2019
 Railroad from a bridge above granite cliffs in Vyborg. Russia, May 24, 2019
 Close-up of crustose lichen Lecanora muralis (Protoparmeliopsis muralis) on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Rosette of crustose lichen Lecanora muralis (Protoparmeliopsis muralis) on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Various crustose lichens on a granite shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Stones scattered on a granite base on a beach of Vyborg Bay on Storozhok Peninsula near granite quarry near Stony Trail (Kamenistaya Tropa) in Kivi Park south from Chulkovo, west from Vyborg. Russia, July 27, 2024
 Pine trees growing among granite stones on a beach of Vyborg Bay on Storozhok Peninsula near granite quarry near Stony Trail (Kamenistaya Tropa) in Kivi Park south from Chulkovo, west from Vyborg. Russia, July 27, 2024
 Grey crustose lichen Aspicilia with firedot lichen Caloplaca on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Grey crustose lichen Aspicilia with orange firedot lichen Caloplaca on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Common grey crustose lichen Aspicilia (sunken disk lichen) on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Gold cobblestone lichen Pleopsidium flavum (Pleopsidium oxytonum)(?) mixed with a grey crustose lichen on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Physcia lichen on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Rosette lichen Physcia on a granite shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Close-up of rosette lichen Physcia on a granite shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Dark brown crustose lichen Caloplaca on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Yellow map lichen (Rhizocarpon geographicum) on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Rock shield lichen (Xanthoparmelia) on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Grey lichen on a granite stone in Paltsevo Rock Massif near Svetogorsk Highway near Vyborg. Russia, July 20, 2024
 Dark brown crustose lichen Caloplaca on pink granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Brown lichen Caloplaca with other crustose lichens on pink granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Growth of yellow map lichen (Rhizocarpon geographicum) on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Rosette of yellow map lichen (Rhizocarpon geographicum) on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Granite boulders in Vyborg Bay near Stony Trail (Kamenistaya Tropa) in Kivi Park south from Chulkovo, west from Vyborg. Russia, July 27, 2024
 Granite stone with saxicolous crustose lichens near the lake south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
 Circular round patch of yellow map lichen (Rhizocarpon geographicum) on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Large granite boulders in Vyborg Bay near Stony Trail (Kamenistaya Tropa) in Kivi Park south from Chulkovo, west from Vyborg. Russia, July 27, 2024
 Granite stones on a beach of Vyborg Bay near Stony Trail (Kamenistaya Tropa) in Kivi Park south from Chulkovo, west from Vyborg. Russia, July 27, 2024
 Large granite stone in Vyborg Bay near Stony Trail (Kamenistaya Tropa) in Kivi Park south from Chulkovo, west from Vyborg. Russia, July 27, 2024
 Crustose lichen with bright orange fluorescence on a granite tomb when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024
 Round patches of crustose lichen with bright orange fluorescence on a granite tomb both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024
 Various saxicolous crustose lichens on a granite stone near the lake near old army bathhouse south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
 Various grey saxicolous crustose lichens on a granite rock near the lake near old army bathhouse south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
 Multicolored saxicolous crustose lichens on a granite rock near the lake near old army bathhouse south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
 Old granite walls behind Vyborg Castle. Vyborg, Russia, September 14, 2013
 Various grey and brown saxicolous crustose lichens on a granite rock near the lake near old army bathhouse south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
 Texture of various grey saxicolous crustose lichens on a granite rock near the lake near old army bathhouse south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
 Granite rocks and a boat in Vyborg Bay from Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Texture of elegant sunburst lichen Rusavskia elegans (formerly Xanthoria elegans) on a granite shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Elegant sunburst lichen Rusavskia elegans (formerly Xanthoria elegans) on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Close-up of elegant sunburst lichen Rusavskia elegans (formerly Xanthoria elegans) on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
 Some grey crustose lichen on a stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
 Grey folios lichen on a granite stone near the gulf in Sobstvennaya Dacha Park. Old Peterhof, west from Saint Petersburg, Russia, May 17, 2019
 Mexican yolk lichen (Candelina submexicana) together with granite rosette lichen (Physcia halei) at the edge of a granite stone in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Close up of grey folios lichen on a granite stone near the gulf in Sobstvennaya Dacha Park. Old Peterhof, west from Saint Petersburg, Russia, May 17, 2019
 Grey crustose lichen on limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Dark-green crustose lichen on limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Granite rocks in Monrepo Park. Vyborg, Russia, May 27, 2011
 Golden lichen Xanthoria parietina with another grey crustose lichen on a stone in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, July 31, 2024
 Granite rocks in Monrepo Park. Vyborg, Russia, September 1, 2007
 Granite stones in Monrepo park. Vyborg, Russia, August 12, 2012
 Granite fence of Monrepo park. Vyborg, Russia, August 12, 2012
 Granite stones in Monrepo Park. Vyborg, Russia, September 1, 2007
 Some dark-green crustose lichen on a limestone rock near the river in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Granite wall near Monrepo (Mon Repos) Park. Vyborg, Russia, September 10, 2016
 Powdered sunshine lichen (Vulpicida pinastri) and another crustose lichen on a conifer log in Petiayarvi, north from Saint Petersburg. Russia, August 3, 2024
 Large granite stones in Monrepo (Mon Repos) Park. Vyborg, Russia, June 23, 2017
 Close up of map lichen Rhizocarpon petraeum on a granite stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
 Texture of map lichen Rhizocarpon petraeum on a granite stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
 Circular patterns of map lichen Rhizocarpon petraeum on a granite stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
 Details of grey saxicolous crustose lichen on a rock near the lake near old army bathhouse south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
 Dark grey saxicolous crustose lichen on a rock near the lake near old army bathhouse south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
 Granite wall in Monrepo (Mon Repos) Park. Vyborg, north from Saint Petersburg, Russia, October 7, 2016
 Granite stones in Monrepo (Mon Repos) Park. Vyborg, north from Saint Petersburg, Russia, October 7, 2016
 Granite boulders in Monrepo (Mon Repos) Park near Malaya Vodyanaya Street. Vyborg, Russia, September 14, 2013
 Close up of dark grey saxicolous crustose lichen on a rock near the lake near old army bathhouse south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
 Texture of dark grey saxicolous crustose lichen on a rock near the lake near old army bathhouse south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
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