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Fluorescent lichens growing on a flat tombstone in ultraviolet light in City Cemetery. Bryan, Texas, October 24, 2024

Granite tomb with fluorescent crustose lichens in ultraviolet light in City Cemetery. Bryan, Texas, October 24, 2024

Flat tombstone overgrown by crustose lichens 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

Crustose lichens of a rough surface of a tombstone both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024

Various crustose lichens on a flat surface of a romb both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024

Caloplaca and Xanthoparmelia lichens on a granite tombstone when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Marble tombstone of Duntain (1853-1921) both in natural light and under 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Various crustose lichens on back of a granite tombstone 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

Tomb of Gullied with crustose lichens both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024

Crustose lichens on a tombstone of S. Shanna when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in Calvert Cemetery. Calvert, Texas, November 3, 2024

Marble tombstone of Hill(?) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Speckled lichens on a back of a granite tombstone both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024

Marble tombstone of Mary Koppe when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Handshake symbol on a marble tombstone when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Tombstone of Herne(?) with firedot lichen Caloplaca when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Firedot lichen Caloplaca on a granite tombstone of Herne when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Freemason s carved symbol with greenish lichens on a tombstone both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Calvert Cemetery. Calvert, Texas, November 3, 2024

Blue and orange fluorescent lichens on bark of hackberry in ultraviolet light in Lemontree Park. College Station, Texas, November 5, 2024

Crustose lichens on a wooden bench in ultraviolet light in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, October 11, 2024

Wood of a bench with crustose lichens in ultraviolet light in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, October 11, 2024

Close-up of blue and orange fluorescent lichens on bark of hackberry in ultraviolet light in Lemontree Park. College Station, Texas, November 5, 2024

Wooden bars of a bench with crustose lichens both in natural light and under 365 nm ultraviolet (UV-A) blacklight in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, October 11, 2024

Various crustose lichens on a weatered wooden bench both in natural light and under 365 nm ultraviolet (UV-A) blacklight in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, October 11, 2024

Colors of crustose lichens on a weatered wooden bench both in natural light and under 365 nm ultraviolet (UV-A) blacklight in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, October 11, 2024

Lichens on a granite tombstone in City Cemetery. Bryan, Texas, December 15, 2012

Crustose lichens in ultraviolet light on bark of a hackberry in Lemontree Park. College Station, Texas, August 22, 2024

Crustose lichens on bark of hackberry in ultraviolet light in Lemontree Park. College Station, Texas, November 5, 2024

Rough bark of a live oak with crustose lichens in ultraviolet light in Thomas Park. College Station, Texas, August 21, 2024

Crustose lichens on an iron bridge in ultraviolet light in Lick Creek Park. College Station, Texas, August 27, 2024

Fluorescent lichens on a cast iron fence of a 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

Handshake symbol with orange and green lichens on a marble tombstone in City Cemetery. Bryan, Texas, December 8, 2018

Crustose lichens in ultraviolet light on a small mesquite tree on Post Oak Trail in Lick Creek Park. College Station, Texas, August 23, 2024

Sidewalk firedot (Xanthocarpia feracissima) with other crustose lichens in ultraviolet light on a concrete path in Lemontree Park. College Station, Texas, August 22, 2024

Crustose lichens on bark of a fallen water oak in ultraviolet light on Racoon Run Trail in Lick Creek Park. College Station, Texas, November 15, 2024

Close-up of crustose lichens in ultraviolet light on a small mesquite tree on Post Oak Trail in Lick Creek Park. College Station, Texas, August 23, 2024

Texture of sidewalk firedot (Xanthocarpia feracissima) with other crustose lichens in ultraviolet light on a concrete path in Lemontree Park. College Station, Texas, August 22, 2024

Close-up of crustose lichens with apothecia in ultraviolet light on a small mesquite tree on Post Oak Trail in Lick Creek Park. College Station, Texas, August 23, 2024

Stown bowl with crustose lichens 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

Granite tomb of Moor(?) with crustose lichens 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

Handshake symbol on a tombstone both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024

Masonic compass symbol on a tombstone both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024

Top of a marble stella when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Tomb of M. Derde when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Trunk of a red cedar tree when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Tomb of William Koppe when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Marble angel over a tomb when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Granite tomb of Campbell with lichens both in natural light and under 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

Firedot lichen Caloplaca on a tomb of W. S. Minkert when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Marble tomb of Belle (1809-1893) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in City Cemetery. Bryan, Texas, October 24, 2024

Marble tombstone of Mary A. Calvert (10/22/1835-7/24/1881) both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Calvert Cemetery. Calvert, Texas, November 3, 2024

Granite tombstone with sidewalk firedot lichen (Xanthocarpia feracissima, Caloplaca feracissima) both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024

Crustose lichens on bark of a small honey mesquite tree when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in Lick Creek Park. College Station, Texas, October 25, 2024

Wooden bar of a bench with crustose lichens when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, October 11, 2024

Iron stand with lichens of a cast iron tomb fence both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024

Iron knob with lichens of a cast iron fence of a tomb both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024

Two pebbles of a mineral Yooperlite (syenite rock rich with fluorescent sodalite) glowing under ultraviolet light. College Station, Texas, February 29, 2024

Sample of a mineral syenite rock rich with fluorescent sodalite (Yooperlite) glowing under ultraviolet light. College Station, Texas, February 29, 2024

Iron cedar tree with lichens of a cast iron tomb fence both in natural light and under 365 nm ultraviolet (UV-A) blacklight in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024

Lichens at the base of a swamp cypress in ultraviolet light at a parking on Dartmouth Street in Wolf Pen Creek Park. College Station, Texas, October 9, 2024

Handshake on a tombstone in City Cemetery. Bryan, Texas, January 6, 2013

Petrified wood tombstone in City Cemetery. Bryan, Texas, December 30, 2012

Tombstone near a cypress tree in City Cemetery. Bryan, Texas, August 4, 2013

Crustose lichens on bark of a live oak when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in Thomas Park. College Station, Texas, August 21, 2024

Close-up of a section of a grapefruit both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Farm Patch Produce Market in Bryan. Texas, October 9, 2024

Various crustose lichen on a trunk of oak tree in ultraviolet light in Bee Creek Park. College Station, Texas, August 19, 2024

Mysterious tombstone marked by letters "S J" in City Cemetery. Bryan, Texas, December 15, 2012

Some grey lichen on a granite tombstone in City Cemetery. Bryan, Texas, March 3, 2019

Calla flowers on a marble tombstone in City Cemetery. Bryan, Texas, December 30, 2012

Crustose lichens on an iron bridge when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in Lick Creek Park. College Station, Texas, August 27, 2024

Section of scallop squash (Patty Pan) both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Farm Patch Produce Market in Bryan. Texas, October 9, 2024

Some grey lichen together with Caloplaca on a granite tombstone in City Cemetery. Bryan, Texas, March 3, 2019

Crustose lichens and Ramalina on an iron bridge when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in Lick Creek Park. College Station, Texas, August 27, 2024

Close-up of rough bark of a live oak with crustose lichens when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in Thomas Park. College Station, Texas, August 21, 2024

Some grey lichen with black apothecia on a granite tombstone in City Cemetery. Bryan, Texas, March 3, 2019

Rock-shield lichen (Xanthoparmelia) on a granite tombstone in City Cemetery. Bryan, Texas, December 8, 2018

Flat tombstone on Voznesenskaya Lane in Smolenskoe Cemetery of Vasilievsliy Island. Saint Petersburg, Russia, October 27, 2016

Lichens on a granite tomb in City Cemetery. Bryan, Texas, January 17, 2023

Lichens on stone roses in City Cemetery. Bryan, Texas, December 15, 2012

Lichens on a handshake symbol in City Cemetery. Bryan, Texas, December 15, 2012

Angel with green lichens in City Cemetery. Bryan, Texas, January 27, 2020

Close up of some grey lichen with black apothecia on a granite tombstone in City Cemetery. Bryan, Texas, March 3, 2019

Green lichens on a marble angel in City Cemetery. Bryan, Texas, January 17, 2023

Stone flowers with orange lichens in City Cemetery. Bryan, Texas, December 8, 2018

Peppered rock-shield lichen (Xanthoparmelia conspersa) on a granite tombstone in City Cemetery. Bryan, Texas, March 3, 2019

Xanthoparmelia conspersa and Caloplaca lichens on a tomb in City Cemetery. Bryan, Texas, January 3, 2019

Crustose lichen Pertusaria in ultraviolet light on a small mesquite tree on Post Oak Trail in Lick Creek Park. College Station, Texas, August 23, 2024

Marble child s head with black and green lichens in City Cemetery. Bryan, Texas, December 8, 2018

Headless marble statue with lichens on a child s tomb in City Cemetery. Bryan, Texas, December 8, 2018

Trunk of honey mesquite (Prosopis glandulosa) with lichens under ultraviolet light on Post Oak Trail in Lick Creek Park. College Station, Texas, September 5, 2024

Lichens glowing blue and yellow on a trunk of honey mesquite under ultraviolet light on Post Oak Trail in Lick Creek Park. College Station, Texas, September 5, 2024

Crustose lichens on a thin oak when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight collected on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 31, 2024

Carved Holy Bible on a marble tombstone 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

Lichens on a large sandstone rock in ultraviolet light in Leach Teaching Gardens at Texas A and M University. College Station, Texas, September 16, 2024

Pertusaria and other crustose lichens on a thin oak when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight collected on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, August 31, 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

Close-up of lichens glowing blue and yellow on a trunk of honey mesquite under ultraviolet light on Post Oak Trail in Lick Creek Park. College Station, Texas, September 5, 2024

Colorful scarecrow in ultraviolet light in Odd Fellow Cemetery. Anderson, Texas, November 9, 2024

Handshake symbol on a marble tombstone when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in Calvert Cemetery. Calvert, Texas, November 3, 2024