 Flower bud of yellow thistle (Bull thistle, Cirsium horridulum) in Lick Creek Park. College Station, Texas, April 11, 2018
 Yellow thistle (Bull thistle, Cirsium horridulum) in Lick Creek Park. College Station, Texas, April 5, 2019
 Blooming yellow thistle (Bull thistle, Cirsium horridulum) in Lick Creek Park. College Station, Texas, April 5, 2019
 Flower bud of yellow thistle (Bull thistle, Cirsium horridulum) in Lick Creek Park. College Station, Texas, April 14, 2019
 Flower of yellow thistle (Bull thistle, Cirsium horridulum) in Lick Creek Park. College Station, Texas, April 5, 2019
 Flower of yellow thistle (Bull thistle, Cirsium horridulum) with a bronze beetle in Lick Creek Park. College Station, Texas, April 5, 2019
 Yellow thistle (Bull thistle, Cirsium horridulum) on Post Oak Trail in Lick Creek Park. College Station, Texas, March 26, 2019
 Flower bud of yellow thistle (Bull thistle, Cirsium horridulum) on Post Oak Trail in Lick Creek Park. College Station, Texas, March 26, 2019
 Yellow thistle (Bull thistle, Cirsium horridulum) on Lone Star Trail in Sam Houston National Forest, near Huntsville. Texas, April 8, 2018
 Fluffy seeds of bull thistle (Cirsium horridulum) in Lick Creek Park. College Station, Texas, May 7, 2018
 Yellow thistle (Bull thistle, Cirsium horridulum)(?) in Bastrop State Park. Bastrop, Texas, March 17, 2018
 Yellow spiny thistle (Bull thistle, Cirsium horridulum) at sunrise in Lake Bryan Park. Bryan, Texas, April 13, 2010
 Yellow thistle (Bull thistle, Cirsium horridulum)(?) on mulch in a tree utilization site in Bastrop State Park. Bastrop, Texas, March 17, 2018
 Yellow thistle (Bull thistle, Cirsium horridulum) on Whitman Road, near Washington. Texas, March 22, 2009
 Yellow thistle (Bull thistle, Cirsium horridulum) in Lake Bryan Park. Bryan, Texas, March 20, 2010.
 Bull thistle (Cirsium horridulum) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, April 5, 2020
 Fluffy seeds of thistle (Cirsium) in Lick Creek Park. College Station, Texas, May 20, 2014
 Florets of a thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 7, 2012
 Flower of thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 22, 2012
 Thistle (Cirsium engelmannii) heads in Lick Creek Park. College Station, Texas, June 22, 2012
 Flower of thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 26, 2012
 Thistle (Cirsium engelmannii) flower in Lick Creek Park. College Station, Texas, June 30, 2012
 Blooming thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 26, 2012
 Thistle (Cirsium engelmannii) flower bud in Lick Creek Park. College Station, Texas, June 10, 2012
 Blooming thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 22, 2012
 Summer-blooming thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 10, 2014
 Spiny flower bud of a thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 20, 2012
 Thistle flower heads (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 7, 2012
 Thistle (Cirsium engelmannii) flower buds in Lick Creek Park. College Station, Texas, June 10, 2012
 Close up of a flower of thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 22, 2012
 Summer-blooming thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 3, 2014
 Winter rosette of leaves of thistle (Cirsium) in Lick Creek Park. College Station, Texas, February 1, 2021
 Close up of a thistle (Cirsium engelmannii) flower bud in Lick Creek Park. College Station, Texas, June 10, 2012
 Globular flower bud of a thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 10, 2012
 Thistle (Cirsium engelmannii) on sewage line right of way in Lick Creek Park. College Station, Texas, July 7, 2012
 Spiny globular flower bud of a thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, June 10, 2012
 Flower of a thistle (Cirsium engelmannii(?)) near Deer Run Trail in Lick Creek Park. College Station, Texas, June 8, 2008
 Flower bud of summer-blooming thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 10, 2014
 Flower of summer-blooming thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 1, 2014
 Flower bud of summer-blooming thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 1, 2014
 Summer-blooming thistle flower (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 10, 2014
 Blooming thistle (Cirsium engelmannii?) on Iron Bridge Trail in Lick Creek Park. College Station, Texas, July 30, 2008
 Flower of summer-blooming thistle (Cirsium engelmannii) in Lick Creek Park, on Deer Run Trail. College Station, Texas, June 21, 2008
 Seeds of summer-blooming thistle (Cirsium engelmannii) near Raccoon Run Trail in Lick Creek Park. College Station, Texas, July 22, 2020
 Summer-blooming thistle flower (Cirsium engelmannii) from above in Lick Creek Park, on Iron Bridge Trail. College Station, July 6, 2008
 Summer-blooming thistle flower (Cirsium engelmannii) in Lick Creek Park, on Iron Bridge Trail. College Station, July 6, 2008
 Blooming summer-blooming thistle (Cirsium engelmannii) in Lick Creek Park. College Station, Texas, July 3, 2014
 Thistle (Cirsium engelmannii) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Thistle flower (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 21, 2018
 Bud of thistle in Lick Creek Park. College Station, Texas, July 15, 2014
 Bumblebee on thistle in Lick Creek Park. College Station, Texas, July 26, 2014
 Blooming thistle in Lick Creek Park. College Station, Texas, July 15, 2014
 Thistle flower in Lick Creek Park. College Station, Texas, July 17, 2009
 Shoot of a plant looking like sow thistle in Lick Creek Park. College Station, Texas, May 11, 2020
 Seeds of thistle in Lick Creek Park. College Station, Texas, July 15, 2014
 Flower bud of thistle Cirsium texanum on Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, April 26, 2020
 Flower of summer thistle in Lick Creek Park. College Station, Texas, July 15, 2014
 Katydid on seeds of thistle in Lick Creek Park. College Station, Texas, July 15, 2014
 Crab like spider in a thistle in Lick Creek Park. College Station, Texas, July 17, 2009
 "Exploding" seeds of a thistle in Lick Creek Park. College Station, Texas, July 30, 2009
 Flower of summer thistle in Lick Creek Park. College Station, Texas, July 22, 2014
 Winter rosette of thistle in Lick Creek Park. College Station, Texas, December 11, 2020
 Flower bud of summer thistle in Lick Creek Park. College Station, Texas, July 22, 2014
 Opening thistle flower in Lick Creek Park. College Station, Texas, July 17, 2009
 Crab spider on a thistle in Lick Creek Park. College Station, Texas, July 7, 2012
 Leaves of a thistle under small oaks in Lick Creek Park. College Station, Texas, January 3, 2021
 Close up of "exploding" seeds of a thistle in Lick Creek Park. College Station, Texas, July 30, 2009
 Flower bud of a thistle on Iron Bridge in Lick Creek Park. College Station, Texas, June 8, 2010
 Frostweed and a thistle on Racoon Run Trail in Lick Creek Park. College Station, Texas, July 17, 2013
 Opening spherical seed head of a thistle in Lick Creek Park. College Station, Texas, July 30, 2009
 Thistle with seeds and a green lynx spider in Lick Creek Park. College Station, Texas, July 30, 2009
 Rosette of leaves of thistle (Cirsium) in a pine forest on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, May 19, 2018
 Large green winter basal rosette of thistle in Lick Creek Park. College Station, Texas, December 11, 2020
 Opening thistle flower in Lick Creek park, on Iron Bridge Trail. College Station, June 15, 2008
 Emerging thistle flower in Lick Creek park, on Iron Bridge Trail. College Station, June 15, 2008
 Flower crab spider (Misumenops celer(?)) eating a skipper butterfly on a thistle in Lick Creek Park. College Station, Texas, July 30, 2009
 Flower longhorned beetle Strange Virile Bycid (Strangalia virilis) mimicking as a wasp on a thistle in Lick Creek Park. College Station, Texas, July 13, 2008
 Thistle (Cirsium) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, June 14, 2020
 Flower of thistle (Cirsium) in Lake Bryan Park. Bryan, Texas, May 1, 2020
 Thistle (Cirsium) in Bastrop State Park. Bastrop, Texas, September 15, 2012
 Sow thistle-like plant in Wolf Pen Creek Park. College Station, Texas, March 19, 2020
 Cabbage thistle (Cirsium oleraceum, Russian name Bodyak) in Aleksandrovsky Park in Pushkin (former Tsarskoe Selo), a suburb of Saint Petersburg. Russia, July 10, 2010
 Blooming thistle (Cirsium heterophyllum(?), Russian name Bodiak) in Aleksandrovsky Park in Pushkin (former Tsarskoe Selo), a suburb of Saint Petersburg. Russia, July 10, 2010
 Field thistle (Cirsium) in fields west from Deviatkino. Saint Petersburg, Russia, June 29, 2011
 Field thistle (Cirsium) in Siverskaya, 50 miles south from Saint Petersburg. Russia, July 13, 2017
 Close up of Cabbage thistle (Cirsium oleraceum, Russian name Bodyak) in Aleksandrovsky Park in Pushkin (former Tsarskoe Selo), a suburb of Saint Petersburg. Russia, July 10, 2010
 Blooming Cabbage thistle (Cirsium oleraceum, Russian name Bodyak) in Aleksandrovsky Park in Pushkin (former Tsarskoe Selo), a suburb of Saint Petersburg. Russia, July 10, 2010
 Flowers of field thistle (Cirsium) in Siverskaya, 50 miles south from Saint Petersburg. Russia, July 13, 2017
 Rosette of leaves of thistle (Cirsium) on roadside near Kavgolovskoe Lake. North from Saint Petersburg, Russia, May 3, 2017
 Flower buds of thistle (Cirsium) in fields near Deviatkino in northern Saint Petersburg. Russia, July 25, 2016
 Field thistle (Cirsium) east from Toksovo, 10 miles north from Saint Petersburg. Russia, July 9, 2009
 Spear Thistle (Cirsium vulgare) in fields near Deviatkino in northern Saint Petersburg. Russia, July 25, 2016
 Cabbage thistle (Cirsium oleraceum, Russian name Bodyak) in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, July 19, 2015
 Creeping Thistle (Cirsium arvense, Russian name Bodiak) west from Deviatkino. Saint Petersburg, Russia, July 20, 2012
 Seeds of Creeping Thistle (Cirsium arvense) in fields west from Deviatkino. Saint Petersburg, Russia, August 15, 2012
 Immature flower head of Cabbage thistle (Cirsium oleraceum, Russian name Bodyak) in Aleksandrovsky Park in Pushkin (former Tsarskoe Selo), a suburb of Saint Petersburg. Russia, July 10, 2010
 Thistle flower (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
 Winter rosette of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Flower of creeping thistle (Cirsium arvense, Russian name Bodiak) in fields near Deviatkino in northern Saint Petersburg. Russia, July 25, 2016
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