 Flower bud of a thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Young leaves of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Young leaves of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Young leaves and flower buds of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Flower of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Blooming thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Thorny leaves of some thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Thorny rosette of leaves of some thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Pattern of winter rosette of leaves of some thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Rosette of leaves of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Large shoot of bull nettle (Cnidoscolus texanus) in shade under live oaks in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Flower bud of Texas thistle (Cirsium texanum) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Thistle flower (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 5, 2022
 Thistle flower (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
 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
 Fluffy seeds of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
 Winter rosette of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Dry seed heads of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
 Batterfly on a thistle flower (Cirsium) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2020
 Leaves of bull thistle (Cirsium horridulum) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
 Pecan shoot in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Shoot of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Rosette of leaves of bull thistle (Cirsium horridulum) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
 Shoot of greenbrier (Smilax) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Shoot of mustang grape in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Shoot and flowers of box elder in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Shoot of box elder near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Shoot of warty spurge (Euphorbia spathulata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Shoot of woolly-white (Hymenopappus artemisiaefolius) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Shoot of rough-leaf dogwood (Cornus drummondii) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Flower buds of Texas thistle (Cirsium texanum) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Large winter rosette of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Prickly flower buds on a shoot of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Shoot with folded leaves of western soapberry (Sapindus saponaria var. drummondii) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Close-up of a rosette of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Thorny rosette of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Winter rosette of sow thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Purple winter rosette of sow thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Pattern of a thorny rosette of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Winter rosette of some thistle under trees in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Thorny leaves of a rosette of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Thorny basal leaves of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Center part of a thorny rosette of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Purple leaves of sow thistle (Sonchus oleraceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Winter rosette of milk thistle (Carduus marianus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 16, 2023
 Shoot of elm in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Shoot of cedar elm in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
 Shoot of box elder in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Central area of a winter rosette of milk thistle (Carduus marianus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 16, 2023
 Thorny rosette of leaves of a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Thorny winter rosette of a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Back lit shoot of cedar elm in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
 Shoot of hackberry with flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Shoot of of mustang grape in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Yellow flower of sow thistle (Sonchus oleraceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Shoot of hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Shoot of gum Bumelia (Sideroxylon lanuginosum) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Shoot of winged elm (Ulmus alata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Shoot of poison ivy on a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Shoot of eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Reddish shoot of red buckeye (Aesculus pavia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Shoot of squaw-weed (Senecio ampullaceus) with flower buds in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Shoot of meadow garlic (Allium canadense) with green bulblets in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Shoot of Virginia creeper vine on a tree, with patches of various lichens in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 15, 2009
 Shoot of Virginia creeper vine on a tree covered by bark lichens in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 15, 2009
 Flower of a thustle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 24, 2020
 Thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 17, 2014
 Flower of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 Thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 Green grasshopper on a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 5, 2022
 Shoots of elm tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Prairie with bluebonnets in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Pink phlox in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Shoot of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 Sow thistle seedling near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 20, 2013
 Opening thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
 Winter rosette of some thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
 Winter rosette of a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
 Thistle flower near Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2008
 Purple thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 Flower head of field thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2010
 Winter rosette of a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 7, 2024
 Shoot of blackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Shoot of coralberry(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 8, 2021
 Shoot of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Shoot of cypress elm in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Bluebonnet and phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Bulblets of Canada garlic in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Blooming bluebonnet (Lupinus) 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
 Shoots and flowers of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Tender leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Large flower of showy evening primrose (Oenothera speciosa) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Winter rosette of musk thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 8, 2021
 Winter rosette of sow thistle near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 27, 2013
 Brown beetle on a thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 12, 2014
 Spiny leaves of a thistle near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
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