 Yellow map lichen (Rhizocarpon geographicum) on granite 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
 Close up of crater lichen Diploschistes scruposus 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
 Diploschistes lichen on granite in Monrepos Park in Vyborg. Russia, May 24, 2019
 Trumpet like Cladonia lichen in moss in Monrepos Park in Vyborg. Russia, May 24, 2019
 Buellia(?) lichen on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Some crustose lichen at the foot of 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
 Black Lecanora like lichen on granite cliffs in Monrepos Park in Vyborg. Russia, May 24, 2019
 Cladonia lichen at the foot of 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
 Thick crust of some greenish lichen on granite cliffs 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
 Yellowish dust-like lichen at the foot of granite cliffs 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
 Some grey folios lichen at the foot of 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
 Crater lichen Diploschistes scruposus 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
 Crater lichen Diploschistes scruposus 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
 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 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
 Salted shield lichen (crottle, Parmelia saxatilis)(?) on 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
 Close up of map lichen Rhizocarpon petraeum on a granite stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
 Granite grotto 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
 Texture of map lichen Rhizocarpon petraeum on a granite stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
 Map lichen Rhizocarpon petraeum on a roadside stone in a forest 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
 Close up of yellow cobblestone lichen Acarospora socialis on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Close up of yellow cobblestone lichen Acarospora socialis in partial shade on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Map lichen Rhizocarpon petraeum on the surface of a rock in Zakhodskoe, 50 miles north from Saint Petersburg. Russia, July 10, 2016
 Black and grey map lichen Rhizocarpon petraeum on the surface of a rock in Zakhodskoe, 50 miles north from Saint Petersburg. Russia, July 10, 2016
 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
 Close up of medallion lichen (Dirinaria confusa) in Lick Creek Park. College Station, Texas, January 6, 2019
 Close up of warty lichen (Pertusaria) on concrete remains near the columns in Old Bailor park. Independence, Texas, February 27, 2019
 Close up of Physcia lichen with brown apothecia in Lick Creek Park. College Station, Texas, February 3, 2019
 Close up of thorn lichen Cladonia uncialis in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, May 25, 2019
 Close up of powdered sunshine lichen (Vulpicida pinastri) on a log in Petiayarvi, north from Saint Petersburg. Russia, May 26, 2019
 Close up of reindeer lichen Cladonia rangiferina in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, May 25, 2019
 Close up of white fringe lichen (Heterodermia albicans) in Lick Creek Park. College Station, Texas, January 18, 2019
 Close up of some foliose lichen on a fallen tree branch in Tarkhovka near Sestroretsk. West from Saint Petersburg, Russia, May 13, 2019
 Close up of Iceland moss lichen (Cetraria islandica) in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, May 25, 2019
 Close up of Iceland moss lichen (Cetraria islandica) in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, May 25, 2019
 Close up of jelly mushrooms Ditiola radicata in Monrepo (Mon Repos) Park. Vyborg, Russia, June 23, 2017
 Close up of black and green lichen Verrucaria on limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Close up of grey reindeer lichen (Cladonia rangiferina) in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
 Close up of star-tipped reindeer lichen (Cladonia stellaris) in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, May 25, 2019
 Close up of powdery medallion lichen (Dirinaria applanata)(?) on yaupon holly in Lick Creek Park. College Station, Texas, January 18, 2019
 Close up of green Cladonia lichen on sandstone or limestone in a forest in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Close up of perforated ruffle lichen (Parmotrema perforatum) on a fallen oak twig in Lick Creek Park. College Station, Texas, January 22, 2019
 Close up of reindeer lichen (Cladonia rangiferina) in a pine forest in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
 Close up of hoary rosette lichen Physcia aipolia on a fallen aspen tree near Kuzmolovo, north from Saint Petersburg. Russia, May 8, 2019
 Close up of bark sulphur-firedot lichen (Caloplaca flavorubescens) on a hackberry tree in Lick Creek Park. College Station, Texas, February 3, 2019
 Close up of script lichen Graphis scripta on a tree near Road 41K-064 south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
 Close up of tiny yellow slime mold (Mycetozoa) under a pine log in Bastrop State Park. Bastrop, Texas, November 28, 2019
 Close up of button lichen (Buellia) on sandstone of Fehr s Overlook Shelter in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Close up of rosette lichen (Physcia) on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Close up of firedot lichen Caloplaca squamosa near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Yellow cobblestone lichen Acarospora socialis on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Yellow cobblestone lichen Acarospora socialis on sandstone of Fehr s Overlook Shelter in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Yellow cobblestone lichen Acarospora socialis on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, October 13, 2019
 Close up of stonewall rim-lichen (Lecanora muralis) on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Faded yellow cobblestone lichen Acarospora socialis on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, October 13, 2019
 Pattern of yellow cobblestone lichen Acarospora socialis on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Close up of dog lichen (Peltigera membranacea) at the base of a tree north from Komarovo, 20 miles north-west from Saint Petersburg. Russia, May 22, 2019
 Dark brown crustose lichen Caloplaca growing on a yellow dispersed lichen Acarospora (cobblestone, or cracked lichen) in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Yellow cobblestone lichen Acarospora socialis in partial shade on sandstone near Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Yellow cobblestone lichen Acarospora socialis in partial shade on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Close up of yellow flowers of common wood sorrel (Oxalis stricta) on Lost Pines Trail in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Texture of yellow cobblestone lichen Acarospora socialis in partial shade on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019
 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
 Close up of Dirinaria lichen on a tree on Kiwanis Nature Trail, College Station, Texas, February 26, 2019
 Close up of rosette lichen (Physcia) on a marble tomb in City Cemetery. Bryan, Texas, March 3, 2019
 Close up of blue-gray rosette lichen Physcia caesia on a granite stone in dunes near the lake south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
 Close up of powdered shadow lichen (Phaeophyscia hirsuta) on a tombstone in Boonville Cemetery. Bryan, Texas, January 27, 2019
 Close up of some grey lichen with black apothecia on a granite tombstone in City Cemetery. Bryan, Texas, March 3, 2019
 Close up of stonewall rim-lichen (Lecanora muralis, Protoparmeliopsis muralis) on sandstone of Lost Pines Overlook in Bastrop State Park. Bastrop, Texas, March 14, 2019
 Yellow cobblestone lichen Acarospora socialis on sandstone at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 25, 2019
 Close-up of yellow umbrella-like circular fans of a parasitic fungus Sporophagomyces chrysostomus(?) growing over brown resupinate polypore mushroom Fuscoporia (Hymenochaetaceae) on Raccoon Run Train in Lick Creek Park. College Station, Texas, December 31, 2019
 Close up of yellow corticioid fungus on underside of a log on Winters Bayou Trail in Sam Houston National Forest. Cleveland, Texas, September 28, 2019
 Yellow cobblestone lichen Acarospora socialis on sandstone outcrops in an oak and red cedar forest at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 25, 2019
 Close up of dixie reindeer lichen (Cladonia subtenuis) in Watson Rare Native Plant Preserve. Warren, Texas, June 22, 2019
 Close up of rock shield lichen (Xanthoparmelia) on a granite tombstone in old Port Sullivan cemetery, west from Hearne. Texas, January 8, 2019
 Felt lichen (common freckle pelt, Peltigera aphthosa) near Pervomayskoe, Vyborg Region. Russia, September 30, 2016
 Lemon discos mushrooms (yellow fairy cups, Bisporella citrina) near Pervomayskoe, Vyborg Region. Russia, September 30, 2016
 Close up of brown-eyed rim-lichen (Lecanora allophana) on Mexican buckeye (Ungnadia speciosa) in Antique Rose Emporium. Independence, Texas, February 27, 2019
 Commandant House with gates, fortress bridge, yacht marina, and Tervaniemen puisto Park with city archive west from Saint Olaf Tower of Vyborg Castle. Vyborg, Russia, May 27, 2011
 Powdery medallion lichen (Dirinaria applanata), to the left, and other foliose lichen on lower branches of old acacia (huisache) between Signature Park 11 apartments and Oil Well near Park Hudson Trail. Bryan, Texas, January 27, 2019
 Close up of medallion lichen (Dirinaria confusa) on an oak in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 12, 2019
 Smooth shadow-crust lichen (Hyperphyscia syncolla) and rosette lichen (Physcia) on lower branches of old acacia (huisache) between Signature Park 11 apartments and Oil Well near Park Hudson Trail. Bryan, Texas, January 27, 2019
 Close up of yellow hydnoid (tooth) mushroom on the lower surface of a pine(?) log on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, September 21, 2019
 Close up of ruffle lichen Parmotrema submarginale on an oak branch in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 12, 2019
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