 Pads of prickly peas cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 25, 2018
 Prickly peas (Opuntia cactus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2014
 Dry skeleton of prickly peas cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 22, 2022
 Rusty pads of prickly peas cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 22, 2022
 Yellow flowers of Prickly pear cactus (Opuntia) in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
 Skeleton of a dry pad of prickly pears cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Dry pad skeleton of prickly pears cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Skeleton of a dry pad of prickly pears cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Texture of a pad skeleton of prickly pear cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Yellow flowers of prickly pears (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2020
 Dry pad skeleton of prickly pear cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Blooming prickly pears cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 30, 2011
 Texture of a pad skeleton of prickly pear cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Vegetative shoot of prickly pear cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Purplish pads of a prickly pear cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Close-up of purple spots on pads of a prickly pear cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Pad of prickly pears (Opuntia) with a bug in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 22, 2022
 Prickly pear (Opuntia) pad in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Prickly pear cacti (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 27, 2019
 Prickly pears (Opuntia) on exposed limestone rocks near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 18, 2020
 Flowers of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
 Pads of prickly pear cactus on Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 27, 2013
 Opening flowers of groundsel (butterweed, squaw weed, Senecio) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 White and yellow flowers of Japanese honeysuckle (Lonicera japonica) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Yellow flowers of aster family with stink bugs near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Yellow and blue flowers of Krigia and Tradescantia in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Yellow flowers of buttercup (Ranunculus) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Prickly peas (Opuntia) cactus in Lick Creek Park. College Station, Texas, December 18, 2018
 Squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Blooming squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Blooming squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2022
 Squaw-weed flower (Senecio ampullaceus) in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2008
 Prickly flowers of Hooker s eryngo (Eryngium hookeri) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 16, 2019
 Flowers of white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
 Small yellow flowers of a plant of tansy mustard (Descurainia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Salt Marsh Moth caterpillar (Estigmene acrea) on Senecio(?) flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Groundsel (butterweed, squaw weed, Senecio) with spider web in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 26, 2010.
 Flower buds of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2022
 Cutleaf groundsel (butterweed, squaw weed, Senecio) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 15, 2009
 Flower buds of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Field of flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 25, 2018
 Various spring flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 25, 2018
 White prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 White prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 21, 2018
 Bluebonnets and paintbrush flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 25, 2018
 Basal rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Shoot of squaw-weed (Senecio ampullaceus) with flower buds in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Flower buds of groundsel (butterweed, squaw weed, Senecio) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Blooming white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Bluebonnets and cutleaf groundsel flowers near Washington-on-the-Brazos State Historic Site. Washington, Texas, March 25, 2018
 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
 Field of bluebonnets and cutleaf groundsel flowers from a fence of Washington-on-the-Brazos State Historic Site. Washington, Texas, March 25, 2018
 Young leaves of prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Leaves of white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Prickly flower buds of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Field of bluebonnets and paintbrush flowers at Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Field of bluebonnets and paintbrush flowers in mist at Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Baby blue eyes flowers (flannel breeches, Nemophila phacelioides) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 25, 2018
 Prickly flower buds on a shoot of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 A field of yellow flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 2, 2007
 Ferry Road with yellow flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 17, 2014
 Leaves of squaw-weed (Senecio ampullaceus) with light yellow areas on leaves caused by sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Yellow flowers of aster family in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 4, 2022
 Yellow pea like flowers of rattlebush (Sesbania drummondii) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 15, 2009
 Flowers of yellow woodsorrel (Oxalis stricta) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Yellow flowers of Engelmann s daisy (Engelmannia peristenia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Pink flowers of pointed phlox (Phlox cuspidata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 25, 2018
 Leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
 Leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
 Squaw-weed flower (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 5, 2008
 Yellow flowers of Linum berlandieri (stiff-stem Flax) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Yellow flowers of Linum berlandieri (stiff-stem Flax) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 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
 Mexican hat (Ratibida columnaris) cylindrical flowerhead with dark red-purple disk flowers and yellow and brown ray flowers on Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 9, 2008
 Prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 17, 2014
 Phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Yellow flower of Engelmann s daisy (Engelmannia peristenia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Yellow flower of false dandelion (Pyrrhopappus carolinianus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Prickly pear pad in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Prickly pears in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 16, 2011
 Mexican hat flowers (Ratibida columnifera) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 20, 2018
 White phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 21, 2018
 Pink phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Winter rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Basal rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 8, 2021
 Yellow woodsorrel (Oxalis stricta) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
 White prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 14, 2008
 Pad of prickly pears in a forest in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 White prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2012
 White prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2008
 White prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 9, 2008
 White flower of prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 Leaves of prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 4, 2022
 Prickly poppy flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 Mexican hat flowers (Ratibida columnifera) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 20, 2018
 Prickly pear cacti and dry trees in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 27, 2019
 Flower of prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2020
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