 Close-up of a flower head of musk thistle (Carduus nutans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Flower of musk thistle (Carduus nutans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Blooming musk thistle (Carduus nutans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Musk thistle (Carduus nutans) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Musk thistle (Carduus nutans) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2021
 Thorny flowers of musk thistle (Carduus nutans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Winter rosette of musk thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 8, 2021
 Flower head of field thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2010
 Winter rosette of milk thistle (Carduus marianus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
 Winter rosette of milk thistle (Carduus marianus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 16, 2023
 Central area of a winter rosette of milk thistle (Carduus marianus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 16, 2023
 Flower buds of Texas thistle (Cirsium texanum) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 Opening thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
 Flower of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Thistle flower (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 21, 2018
 Purple thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 Blister beetle in genus Nemognatha on thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 Flower head of wild carrot (Daucus pusillus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Flower head of Indian paintbrush (Castilleja indivisa) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Flower head of green milkweed (Asclepias viridis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Flower bud of Texas thistle (Cirsium texanum) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Winter rosette of musk thistle (Carduus nutans, Asteraceae) in Bastrop State Park. Bastrop, Texas, February 23, 2020
 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, May 17, 2014
 Thistle flower (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
 Thistle flower (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 5, 2022
 Flower bud of a thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Thistle flower near Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2008
 Brown beetle on a thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 12, 2014
 Yellow flower of sow thistle (Sonchus oleraceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Blister beetles in genus Nemognatha on thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2008
 Flower head of Mexican hat (Ratibida columnaris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2010
 Blister beetle (Meloidae) in genus Nemognatha on thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 16, 2009
 Young leaves and flower buds of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Batterfly on a thistle flower (Cirsium) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2020
 Flower of a common prairie grass in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2021
 Flower of Engelmann s daisy (Engelmannia peristenia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Flower of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Winter rosette of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Large winter rosette of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Thistle (Cirsium engelmannii) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Blooming thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Flower arrangement of woolly-white (Hymenopappus artemisiaefolius) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Yellow flower of Engelmann s daisy (Engelmannia peristenia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Close-up of a flower of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Rosette of leaves of sow thistle (Sonchus asper) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Winter rosettes of sow thistle (Sonchus asper) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Prickly flower buds of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Yellow and white flower of Indian paintbrush (Castilleja indivisa) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Seed head of sunflower (Helianthus annuus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
 Purple and green leaves of sow thistle (Sonchus asper) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Winter rosette of leaves of sow thistle (Sonchus asper) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Pink basal leaves of sow thistle (Sonchus asper) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Flower buds of green milkweed Asclepias viridis on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Seedling of sow thistle (Sonchus asper) on a mat of frog fruit (Phyla incisa) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Flower spike of red buckeye (Southern buckeye, Aesculus pavia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Winecup flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2008
 Herbertia flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Flower buds of mustang grape in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Fluffy seed head of Texas dandelion (Pyrrhopappus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Prickly poppy flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 White gaura flower in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 5, 2008
 Parts of paintbrush flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2008
 Green grasshopper on a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 5, 2022
 Flower of purple bindweed (Ipomoea cordatotriloba) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 27, 2021
 Flower of violet ruella (Ruellia nudiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 24, 2021
 Mexican hat flower (Ratibida columnifera) in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
 Mexican hat flower (Ratibida columnifera) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
 Mexican hat flower (Ratibida columnifera) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 21, 2018
 White bishops weed-like flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2008
 Katidid on a flower of false dandelion in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Vervain flower in dew in Washington-on-the-Brazos State Historic Site, near Loop Trail. Washington, Texas, April 5, 2008
 Black-eyes susan flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 Yellow lemon paintbrush flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2008
 Young katydid on paintbrush flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2008
 Baby blue eyes flower in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 5, 2008
 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
 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
 Close-up of a rosette of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Winter rosette of a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 7, 2024
 Sow thistle seedling near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 20, 2013
 White prickly poppy flower on field near Old Washington Town Site Loop Trail of Washington-on-the-Brazos State Historic Site. Washington, Texas, June 2, 2007
 Mexican hat flower (Ratibida columnaris) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 27, 2021
 Indian paintbrush flower in Washington-on-the-Brazos State Historic Site, near Loop Trail. Washington, Texas, April 5, 2008
 Squaw-weed flower (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 5, 2008
 Prickly poppy flower with immature katydid in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 Fleabane daisy(?) flower in dew in Washington-on-the-Brazos State Historic Site, near Loop Trail. Washington, Texas, April 5, 2008
 Stick caterpillar on black-eye susan flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 Flower of Indian paintbrush (Castilleja indivisa) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Head of a grasshopper in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 9, 2010
 Thorny winter rosette of a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Purple winter rosette of sow thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Young leaves of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Fluffy seeds of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
 Dry seed heads of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
 Basal leaves of bull thistle(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
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