 Warty texture with corky ridges of bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2010.
 Warty bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 Warty texture of bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 17, 2012
 Corky bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 30, 2010
 Corky ridges of bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 30, 2010
 Warts on bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2010.
 Corky ridges of bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 16, 2010
 Bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Bark of dry hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Bark of dead hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Decomposing bark of dry hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Detail of bark of dry hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Warts on bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Detail of bark of dead hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 20, 2012
 Texture of bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 17, 2012
 Map-like texture of lichens on bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 Close-up of texture of lichens on bark of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 Line of small holes with sap oozing from them bored by birds (Yellow-Bellied Sapsucker, Sphyrapicus varius) in trunk of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2010.
 Detail of trunk of dry hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Berries of hackberry (Celtis occidentalis) in animal droppings in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Blackened trunk of dead hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Shoot of hackberry (Celtis occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Dry leaves of hackberry (Celtis occidentalis) on roadside in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 6, 2013
 Soil pellets among dry leaves of hackberry (Celtis occidentalis) on roadside in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 6, 2013
 Warty texture of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Mixed crustose lichens on bark of a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 29, 2018
 Some green liverwort and lichens on bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Script lichen (Graphis) on bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Tiny green liverwort on bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Script lichen Graphis lineola on bark of a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 29, 2018
 Medallion lichen (Dirinaria confusa) on bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Details of script lichen (Graphis) on bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Texture of script lichen (Graphis) on bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Medallion lichen (Dirinaria confusa) on bark of a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 29, 2018
 Saucer lichen Ochrolechia pallescens on bark of a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 29, 2018
 Saucer lichen Ochrolechia pallescens on bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Sunken bloodspot lichen (Haematomma persoonii) on bark of a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 29, 2018
 Tiny green liverwort and Graphis lichen on bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Saucer lichen Ochrolechia pallescens with apothecia on bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Close up of medallion lichen (Dirinaria confusa) on bark of a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 29, 2018
 Apothecia of medallion lichen (Dirinaria confusa) on bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Apothecia of saucer lichen Ochrolechia pallescens on bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Trunk of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 30, 2010
 Script lichen Graphis lineola and other crustose lichens on bark of a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 29, 2018
 Texture of white fringe lichen (Heterodermia albicans) on bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Scar of a trunk of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 30, 2010
 Detail of hackberry bark in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
 Peeling bark of dry hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Warty texture of bark of hackberry (Celtis occidentalis) on Racoon Run Trail in Lick Creek Park. College Station, Texas, December 17, 2008
 Tiny liverwort on bark of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 Warts on the bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Peeling bark of dead hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Lichen Dirinaria confusa(?) on bark of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 Script lichen (Graphis) on bark of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 Common Button Lichen (Buellia stillingiana) on bark of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 Script lichen Graphis lineola(?) on bark of a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 White fringe lichen (Heterodermia albicans) on bark of a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 Warty lichen (Pertusaria) on a branch of "Liberty Oak" in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 A twig of hackberry tree with fruits in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Hebeloma mushrooms under oak and hackberry trees in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 25, 2020
 Tree bark texture in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 16, 2010
 Brown tree bark in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 29, 2010
 White fringe lichen (Heterodermia albicans) on a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Sapsucker holes in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Bark texture of osage orange in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 24, 2011
 Bark of osage orange near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Dust lichen (Lepraria) on oak bark in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 8, 2019
 Twisted bark of osage orange near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Details of bark of osage orange near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Leaves of hackberry tree with Asian woolly hackberry aphids Shivaphis celti (Homoptera: Aphididae) and sooty black mold (fungal growth) in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 5, 2019
 Dwarf dandelion (Krigia occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 Texture of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Dry leaves of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 10, 2011
 Dead tree of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Trunk of dead hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Dirinaria(?) lichen on hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
 Drying hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Rotten hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Black crust of dried slime mold (Ascomycota) on bark of Maclura(?) tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 29, 2018
 Fringe lichen (Heterodermia) on hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
 Texture of dried hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Lecanora lichen on hackberry(?) tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 24, 2020
 Trunk of dried hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Flower of showy evening primrose (Oenothera speciosa) with holes from insects on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Bluebonnet (lupin) seedling in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 11, 2010
 Saucer lichen Ochrolechia pallescens on hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
 Medallion lichen (Dirinaria confusa) on hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
 Emerging bluebonnet (lupin) seedling in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 11, 2010
 Green lynx spider with spiderlings in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 11, 2010
 Close up of medallion lichen (Dirinaria confusa) on hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
 Bluebonnet (lupin) seedling on fire ant mound in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 11, 2010
 Hackberry(?) fruits and remains of insects in animal dropping near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 25, 2013
 Common button lichen (Buellia stillingiana) on hackberry(?) tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 24, 2020
 Resupinate polypore mushroom Physisporinus vitreus(?) on a hackberry stump in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Smooth shadow-crust lichen (Hyperphyscia syncolla) on a hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 12, 2019
 Sooty black mold fungus on leaves of a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 Sooty black mold (fungal growth) on hackberry leaves in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
 Details of resupinate polypore mushroom Physisporinus vitreus(?) on a hackberry stump in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
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