 Grasshopper on a white prickly poppy flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 24, 2009
 Close up of a green grasshopper sitting on a white prickly poppy flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 24, 2009
 Opening flower of white prickly poppy (pricklepoppy, Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 16, 2009
 White flower of prickly poppy (pricklepoppy, Argemone albiflora) with orange center and delicate crinkled petals in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 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
 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 prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 14, 2008
 Prickly poppy flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 Flower of prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2020
 White prickly poppy (Argemone albiflora) with a katydid in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 27, 2012
 White prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 21, 2018
 White prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 12, 2014
 White prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
 White prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
 Young katydid on white prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 3, 2008
 White prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Prickly poppy flower with immature katydid in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 Blooming white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Leaves of white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 White prickly poppy (Argemone albiflora) with katidid in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 10, 2019
 Seedling of white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
 Blooming white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
 Ovary of white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 1, 2012
 Flowers of white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
 Flower of prickly poppy (Argemone albiflora) with a beetle in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Winter rosette of white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 18, 2020
 Upper view of white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
 Winter rosette of white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Late blooming white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 2, 2022
 Rosette of leaves of white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
 Hover fly (syrphid) on a flower of w hite prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
 Winter rosette of white prickly poppy (Argemone albiflora) with water drops in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 White prickly poppy (Argemone albiflora) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Washington-on-the-Brazos State Historic Site. Washington, Texas, August 29, 2024
 Prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 17, 2014
 Leaves of prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 4, 2022
 Prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Basal leaves of prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Rosette of leaves of prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 7, 2024
 Young leaves of prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Leaves with water drops of prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Small rosette of leaves of prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 White magnolia flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
 Crab spider on a white flower of bull nettle in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 4, 2009
 Flower of common red corn poppy (Papaver rhoeas) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2020
 Young shoot of greenbrier vine (prickly-ivy, smilax, sarsaparilla) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 Close-up of a flower of common red corn poppy (Papaver rhoeas) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2020
 Prickly flower buds of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Prickly flower buds of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 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
 Big white flower of Southern magnolia (Magnolia grandiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 24, 2009
 Central part of a big white flower of Southern magnolia (Magnolia grandiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 24, 2009
 Magnolia flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
 Flower of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 White flowers on a bush in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 24, 2009
 Dry flower spike of plantain in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 24, 2009
 Thistle flower (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
 White gaura flower in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 5, 2008
 White gaura flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 20, 2012
 Mexican hat flower (Ratibida columnifera) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
 Flower of an apple-like tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 15, 2009
 Buttercup flower near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 8, 2009
 White bishops weed-like flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2008
 Pink spiderwort (tradescantia) flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2009
 Tiny yellow flower like evening primrose in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 14, 2009
 Stamens of a pink spiderwort (tradescantia) flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2009
 Cylindrical part of a flower of Mexican hat (Ratibida columnifera) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 Opening flower of black-eyed susan (Rudbeckia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
 Opening flower of black-eyed susan (Rudbeckia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 Common red corn poppy (Papaver rhoeas) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2020
 Flower arrangement of woolly-white (Hymenopappus artemisiaefolius) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 White flower of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Flower buds of woolly-white (Hymenopappus artemisiaefolius) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 White flower of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Flower heads of woolly-white (Hymenopappus artemisiaefolius) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 5, 2008
 Some white five-petals flower on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Blister beetle (Meloidae) in genus Nemognatha on thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 16, 2009
 Prickly pears in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 16, 2011
 Pad of prickly pears (Opuntia) with a bug in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 22, 2022
 Prickly pear pad in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 White berries of rough-leaf dogwood (Cornus drummondii) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 23, 2009
 Yellow and white flower of Indian paintbrush (Castilleja indivisa) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Bee on pink powderpuff flower (Mimosa strigillosa) on Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 15, 2009
 Greenish-yellow, bell-shaped flower of persimmon (Diospyros virginiana) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 Pad of prickly pears in a forest in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
 Prickly pear (Opuntia) pad in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 10, 2011
 Tumbling flower beetle and a snout beetle (white-scaled flower weevil, Odontocorynus denticornis) on a black-eyes susan flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
 Prickly pear cacti and dry trees in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 27, 2019
 Prickly peas (Opuntia cactus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2014
 Yellow flowers of prickly pears (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2020
 Prickly pear cacti (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 27, 2019
 Stamens and apocarpous gynoecium of prickleseed buttercup flower (Ranunculus muricatus) in Washington-on-the-Brazos State Historic Site, near a pond. Washington, February 15, 2009
 Common red corn poppy (Papaver rhoeas) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2020
 Prickly seeds of Hedge Parsley (Torilis arvensis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 17, 2014
 Dry pad skeleton of prickly pears cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Dry skeleton of prickly peas cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 22, 2022
 Pads of prickly peas cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 25, 2018
 Skeleton of a dry pad of prickly pears cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
|