Golden moonglow lichen (Dimelaena oreina, greenish grey) with some black granular lichen in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Blue-edged scale lichen (Psorula rufonigra) (olivaceous) on a filamentous cyanolichen Spilonema revertens (black) in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Farms east from Black Rock Point in Block Island. New Shoreham, Rhode Island, September 5, 2004
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
Farms east from Black Rock Point in Block Island. New Shoreham, Rhode Island, September 5, 2004
Big Crater (Makhtesh Gadol), black rocks and multicolored sands behind picnic tables. The Middle East, December 23, 2000
Firedot lichen Xanthocarpia crenulatella (Caloplaca crenulatella) (orange), Acarospora (brown), Acarospora or Pleopsideum (yellow) and Lecidea(?)(black) lichens on sandstone rocks of a bridge in Wolf Pen Creek Park. College Station, Texas, January 13, 2018
Sunken button lichen (Buellia spuria, ashy grey with black dots) and Aspicilia (grey) crustose lichens in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Leather lichen Dermatocarpon luridum (brownish foliose) on black granular lichen Pyrenopsis in seepage area on horizontal granite surface in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Black limestone rocks in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
Caloplaca together with a black lichen Endocarpon pusillum on a sandstone rock in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020
Black water flowing over rocks in Roshchinka River in Lindulovskaya Reserve near Roshchino, 30 miles north-west from Saint Petersburg. Russia, May 28, 2021
Some black and greenish scaly lichen on sandstone rocks in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
Close-up of some black and greenish scaly lichen on sandstone rocks in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
