 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
 Thorny basal leaves of thistle 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
 Young leaves of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Young leaves of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Young leaves and flower buds of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Thorny rosette of leaves of a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Thorny rosette of 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
 Center part of a thorny rosette of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Rosette of leaves of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Blooming thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Flower bud of a thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Flower of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Large shoot of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 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
 Purple leaves of sow thistle (Sonchus oleraceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 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
 Winter rosette of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Thorny winter rosette of a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Thorny flowers of musk thistle (Carduus nutans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 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
 Dry seed heads of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
 Spiny leaves of a thistle near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
 Batterfly on a thistle flower (Cirsium) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2020
 Violet basal leaves of sow thistle (Sonchus oleraceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
 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
 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 bud of Texas thistle (Cirsium texanum) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Flower buds of Texas thistle (Cirsium texanum) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Leaves of nettle in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Leaves of bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Basal leaves of bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Hairy leaves of bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Leaves of snout-bean (Rhynchosia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Hairy basal leaves of bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Basal leaves of fleabane daisy (Erigeron)(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Hairy rosette of leaves of bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Leaves of prairie parsley (Polytaenia texana) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Basal leaves of bull thistle(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
 Hairy leaves of stemless spiderwort (Tradescantia subacaulis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Basal leaves of prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Close-up of a 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
 Small rosette of leaves of prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Leaves with water drops of prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Rosette of leaves of baby blue eyes (Nemophila phacelioides) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Leaves of sow thistle (Sonchus oleraceus) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
 Winter rosette of some thistle under trees 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
 Rosette of leaves of India mustard (Brassica juncea) or may be Rapistrum rugosum in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Rosette of leaves of sow thistle (Sonchus oleraceus) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
 Winter rosette of some thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
 Sow thistle seedling near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 20, 2013
 Winter rosette of milk thistle (Carduus marianus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 16, 2023
 Large winter rosette of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Rosette of sow thistle (Sonchus oleraceus) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 20, 2013
 Central area of a winter rosette of milk thistle (Carduus marianus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 16, 2023
 Winter rosette of milk thistle (Carduus marianus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
 Purple winter rosette of sow thistle (Sonchus oleraceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
 Winter rosettes of sow thistle (Sonchus asper) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Thorny twig of Huisache (Acacia farnesiana) in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
 Winter rosette of sow thistle (Sonchus oleraceus) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 30, 2022
 Thorny rosette of leaves of thistle (Cirsium) in Bee Creek Park. College Station, Texas, January 27, 2023
 Thorny basal leaves of thistle (Cirsium) in Bee Creek Park. College Station, Texas, January 28, 2023
 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
 Young leaves of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Fresh leaves of nettle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Tender leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Young leaves and flowers of box elder in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Young leaves of purslane (Portulaca)(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Young leaves of mustang grape in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Rosette of leaves of bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Flower of a thustle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 24, 2020
 Young leaves and flower buds of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Close-up of some small basal hairy leaves in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Young leaves of red buckeye (Aesculus pavia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Young leaves of red buckeye (Aesculus pavia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Back lit leaves of red buckeye (Aesculus pavia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Basal leaves of Mexican hat (Ratibida columnaris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Young leaves of gum Bumelia (Sideroxylon lanuginosum) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Leaves of woolly-white (Hymenopappus artemisiaefolius) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Some small hairy winter rosette of leaves in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Young leaves of prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Hairy leaves of plantain(?) on gravel of Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Young leaves of Engelmann s daisy (Engelmannia pinnatifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Young leaves of Yaupon holly turning yellow in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Unfolding leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Rosette of leaves of bluebonnet (Lupinus) on sandy soil in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Young leaves of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Winter rosette of leaves of woolly-white (Hymenopappus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
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