Acorns knocked down by a passed tropical storm Ike on Little Lake Creek Loop Trail in Sam Houston National Forest. Huntsville, Texas, September 14, 2008
Desert oak (Quercus palmeri) with acorns in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, September 13, 2010
Acorns on live oak in Old Baylor Park. Independence, Texas, September 6, 2009
Acorns on the ground in Dixon Prairie Cemetery at Road 163, near Road 21. Bastrop, Texas, February 2, 2008
Desert oak (Quercus palmeri) with green acorns in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, August 23, 2010
Live oak acorns in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, July 29, 2009
Acorns on South Rim Road of Fillmore Glen State Park. Moravia, New York, October 9, 2005
Dry seed head and acorns in Antique Rose Emporium. Independence, Texas, January 26, 2013
Eaten acorn on a log near Racoon Run Trail in Lick Creek Park. College Station, Texas, January 4, 2011
Acorns on live oak taken from New Main Drive on campus of Texas A and M University. College Station, Texas, October 1, 2012
Green acorns on desert oak (Quercus palmeri) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, July 9, 2012
Acorns of desert oak (Quercus palmeri) in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, September 10, 2012
Ciboria batschiana fungus on rotten acorns on mushroom show in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, October 1, 2016
Brown caps of Ciboria batschiana mushrooms on rotten acorns taken from Lisiy Nos, west from Saint Petersburg. Russia, October 9, 2016
Small cup mushrooms Hymenoscyphus fructigenus on acorn shell in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, September 12, 2017
Small cup mushrooms Hymenoscyphus fructigenus on a rotting acorn in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, September 12, 2017
Cup fungus Ciboria batschiana on oak acorns in Blizhnie Dubki area near Lisiy Nos, west from Saint Petersburg. Russia, September 26, 2017
Cup mushrooms Ciboria batschiana on a rotten acorn in Blizhnie Dubki area near Lisiy Nos, west from Saint Petersburg. Russia, September 26, 2017
Nut disco mushrooms (Hymenoscyphus fructigenus) on an acorn in Blizhnie Dubki area near Lisiy Nos, west from Saint Petersburg. Russia, September 26, 2017
Cup mushrooms Ciboria batschiana on an acorn buried in soil in Blizhnie Dubki area near Lisiy Nos, west from Saint Petersburg. Russia, September 26, 2017
Cup mushrooms Ciboria batschiana on underground acorns in Blizhnie Dubki area near Lisiy Nos, west from Saint Petersburg. Russia, September 26, 2017
Cup fungi Ciboria batschiana on underground acorns in Blizhnie Dubki area near Lisiy Nos, west from Saint Petersburg. Russia, September 26, 2017
Cup fungus Ciboria batschiana with an acorn in Blizhnie Dubki area near Lisiy Nos, west from Saint Petersburg. Russia, September 26, 2017
Catkin cup fungus (Ciboria batschiana) on rotten acorns in an oak grove near Razliv Lake, in Sestroretsk area west from Saint Petersburg. Russia, October 2, 2017
Catkin cup mushrooms (Ciboria batschiana) on rotten acorns in an oak grove near Razliv Lake, in Sestroretsk area west from Saint Petersburg. Russia, October 2, 2017
Cup mushrooms Hymenoscyphus fructigenus on a rotting acorn near Lisiy Nos, west from Saint Petersburg. Russia, September 6, 2018
Catkin cup mushrooms (Ciboria batschiana) growing on a rotten acorn near Lisiy Nos, west from Saint Petersburg. Russia, September 6, 2018
Cup mushrooms Hymenoscyphus fructigenus on an acorn skin in a coastal forest between Lisiy Nos and Olgino, west from Saint Petersburg. Russia, September 6, 2018
Dry acorns under an oak in Lick Creek Park. College Station, Texas, March 5, 2020
Cup fungus Ciboria batschiana on acorns in Blizhnie Dubki area near Lisiy Nos, west from Saint Petersburg. Russia, September 26, 2017
Catkin cup mushrooms (Ciboria batschiana) growing on rotten acorns in an oak grove near Razliv Lake, in Sestroretsk area west from Saint Petersburg. Russia, October 2, 2017
Close up of catkin cup mushrooms (Ciboria batschiana) on rotten acorns in an oak grove near Razliv Lake, in Sestroretsk area west from Saint Petersburg. Russia, October 2, 2017
Side view of a small inkcap (Coprinellus) mushroom found on a pile of well rotten acorns and nuts in a cavity at the base of a large magnolia tree on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 23, 2020
Small inkcap (Coprinellus) mushroom found on a pile of well rotten acorns and nuts in a cavity at the base of a large magnolia tree on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 23, 2020
Dissected small inkcap (Coprinellus) mushroom found on a pile of well rotten acorns and nuts in a cavity at the base of a large magnolia tree on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 23, 2020
Green acorns in Antique Rose Emporium. Independence, Texas, August 27, 2021
Fallen acorns from a large red oak in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 20, 2024
Fallen acorns from oaks when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Lick Creek Greenway Trail. College Station, Texas, October 18, 2024
Acorns from oaks both in natural light and under 365 nm ultraviolet (UV-A) blacklight from Lick Creek Greenway Trail. College Station, Texas, October 18, 2024
Acorns fallen from an oak when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Lick Creek Greenway. College Station, Texas, October 26, 2024
Water oak leaves and acorns on a sandy path in Lick Creek Park. College Station, Texas, December 16, 2025
