 Trunk of dried hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Dead tree of hackberry 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
 Blackened trunk of dead hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 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.
 Trunk of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 30, 2010
 Texture of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Scar of a trunk of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 30, 2010
 Peeling bark of dry hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 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
 Detail of trunk of dry hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Warty texture of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Warts on the bark of hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Texture of dried hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Bark of dead hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Detail of bark of dead hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Grasshopper on a tree trunk in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 17, 2012
 Close up of a grasshopper on a tree trunk in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 17, 2012
 Bark of hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 20, 2012
 Gnarl on a dead tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 17, 2012
 Texture of bark of hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 17, 2012
 Fibrous tree trunk in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 16, 2011
 Fibrous tree trunk of cedar in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 16, 2011
 Warty texture of bark of hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 17, 2012
 Dirinaria(?) lichen on hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
 Fringe lichen (Heterodermia) 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
 Texture of some corticioid fungus on a hardwood log (may be elm or hackberry) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2023
 Saucer lichen Ochrolechia pallescens on hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
 Warts on bark of hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2010.
 Close up of medallion lichen (Dirinaria confusa) on hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
 Turtle skeleton and a half-rotten horse apple (osage orange) among leaves of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 20, 2012
 Some odontoid corticioid fungus with irregular surface on a hardwood log (may be elm or hackberry) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2023
 Small patch of orangish resupinate polypore mushroom on a hackberry log in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2023
 Spores of orangish resupinate polypore mushroom from a hackberry log, collected a day before in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 4, 2023
 Smooth shadow-crust lichen (Hyperphyscia syncolla) on a hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 12, 2019
 White resupinate polypore mushroom on a fallen hackberry(?) branch in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2023
 Close-up of small patch of orangish resupinate polypore mushroom on a hackberry log in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2023
 Close-up of white resupinate polypore mushroom on a fallen branch of hackberry(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2023
 Texture of white resupinate polypore mushroom on a fallen branch of hackberry(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2023
 Warty texture with corky ridges of bark of hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2010.
 Spores of odontoid corticioid fungus with irregular surface from a hardwood log (may be elm or hackberry), collected a day before in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 4, 2023
 Mature fungus Brittle cinder (Kretzschmaria deusta) at the base of a dry hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 30, 2022
 White fringe lichen (Heterodermia albicans) (or may be H. japonica, H. casarettiana) on hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
 Spores of odontoid corticioid fungus with irregular surface from a hardwood log (may be elm or hackberry), collected a day before in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 4, 2023
 Spores of white resupinate polypore mushroom from a fallen hackberry(?) branch, collected a day before in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 4, 2023
 Olive patch of smooth shadow-crust lichen (Hyperphyscia syncolla) on a hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 12, 2019
 Details of growth of white resupinate polypore mushroom on a fallen hackberry(?) branch in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2023
 Spores (in lugol) of a polypore mushroom Trametes elegans(?) from hackberry or pecan, collected a day before in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 29, 2023
 Witches butter jelly fungus (Exidia glandulosa) on a dry stem of a hackberry or pecan tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2023
 Spores (in methylene blue) of a polypore mushroom Trametes elegans(?) from hackberry or pecan, collected a day before in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 29, 2023
 Orange trunk of Horse apple (osage orange) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 16, 2011
 Close-up of witches butter jelly fungus (Exidia glandulosa) on a dry stem of a hackberry or pecan tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2023
 Section of witches butter jelly fungus (Exidia glandulosa) on a dry stem of a hackberry or pecan tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2023
 Growth of witches butter jelly fungus (Exidia glandulosa) on a dry stem of a hackberry or pecan tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 3, 2023
 Spores of witches butter jelly fungus (Exidia glandulosa) from hackberry or pecan, collected 3 days before in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 6, 2023
 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
 Lichens in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Dark brown webcap (Cortinarius) mushrooms under elm and hackberry trees on a side of a road in juniper forest, with hackberry and other trees in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 1, 2021
 Sapsucker holes in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Mistletoe on a tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Tree bark in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Shoot of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Blooming hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Dry leaves of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 10, 2011
 Rough tree bark in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Pad of prickly pears in a forest in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Bark of black willow in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Shoots and flowers of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Young leaves of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Shoot of hackberry with flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Fresh leaves of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Detail of hackberry bark in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
 Fresh leaves of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Young leaves of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Young leaves of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Young leaves of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2021
 Old peace of wood on the bottom of a dry pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Rough bark of black willow in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 A pond filling by water after a draught in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Blackened bark of dried tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Bark of hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Shoot of hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Shoot of poison ivy on a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 A twig of hackberry tree with fruits in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Lecanora lichen on hackberry(?) tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 24, 2020
 Hebeloma mushrooms under oak and hackberry trees in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 25, 2020
 Bark of dry hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Tiny liverwort on bark of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 Young tender leaves of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Corky bark of hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 30, 2010
 Young leaves of poison ivy on hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2021
 Dry leaves of hackberry (Celtis laevigata) on roadside in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 6, 2013
 Detail of bark of dry hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Lichen Dirinaria confusa(?) on bark of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 Young leaves and flower buds of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Warty bark of hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
 Decomposing bark of dry hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
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