 Eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Dry seeds of poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
 Eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Shoots of eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 27, 2019
 Shoot of eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Reddish young leaves of poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
 Back lit leaf of eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Young leaves of eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Young leaves of eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Tender leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Some dry plant in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Plant of Snow-on-the-prairie (Euphorbia bicolor) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Dry plant of lemon beebalm (Monarda citriodora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Dry plant of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Wilted plant of Snow-on-the-prairie (Euphorbia bicolor) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Poison ivy near Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Blackberry in poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 5, 2022
 Poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 23, 2012
 Shoot of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 Blooming poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 1, 2010
 Shoot of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Berries of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 1, 2009
 Berries of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 3, 2008
 Green berries of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 22, 2022
 Blooming poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
 Dying poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 6, 2011
 Back lit leaf of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 27, 2012
 Winter rosette of a plant of aster family in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Young leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Reddish shoot of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Young leaf of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 15, 2009
 Fresh leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Back lit shoot of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Fall colors of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 2009
 Young plant of woodland lettuce (Lactuca floridana) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Close-up of winter rosette of a plant of aster family in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Mat of some plant with tiny leaves on gravel of Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Young plant of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Early fall color of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 30, 2008
 Tender young leaves of poison ivy 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
 Green berries of poison ivy on Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 16, 2009
 Tender pink leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Young leaves of poison ivy on hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2021
 Mat of some plant with small hairy leaves on gravel of Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Some blooming plant near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
 Stemless evening primrose (Oenothera triloba) with other plant on gravel of Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Resette of leaves and small white flowers of a plant in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
 Dry soil with cracks in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Snow-on-the-prairie (Euphorbia bicolor) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Snow-on-the-prairie (Euphorbia bicolor) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Wood oats (Chasmanthium latifolium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Dry seeds of lemon beebalm (Monarda citriodora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Dry seeds of prairie parsley (Polytaenia texana) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Dry inflorescence of lemon beebalm (Monarda citriodora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Dry flowers and seeds of lemon beebalm (Monarda citriodora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Small matweed (Guilleminea densa) on Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Fluffy seeds of silver bluestem grass (Bothriochloa laguroides) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Small matweed (Guilleminea densa) on sand of Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Dry plant of phlox in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
 Amaranth like plant in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 8, 2013
 Sagittaria like plant in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 12, 2014
 Pigeon-berry (Rivina humilis, rouge-plant, baby peppers) near a ferry site in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 5, 2018
 Winter rosette of a plant in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 2, 2019
 Amaranth plant in a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 18, 2020
 Pigeon-berry (Rivina humilis, rouge-plant, baby peppers) collected near a ferry site in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 5, 2018
 Hairy winter rosette of some plant in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
 Deformed plant in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 10, 2019
 Fluffy seeds of a plant of aster family in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Some plant of pear family under live oaks in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 8, 2021
 Discolored yellow leaves of some plant on a lawn in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2021
 Young plant of woodland lettuce (Lactuca floridana) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Emerging Snow-on-the-prairie (Euphorbia bicolor) plant in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 9, 2012
 Blooming plant Snow-on-the-prairie (Euphorbia bicolor) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 10, 2019
 Prairie with bluebonnets in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Pecan shoot in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Leaves of nettle in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 28, 2023
 Pink phlox in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Shoots of elm tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Red phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Shoot of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Phlox flowers in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Engelmann s daisy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Small yellow flowers of a plant of tansy mustard (Descurainia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Bulblets of Canada garlic in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Pink phlox flowers in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Fresh leaves of nettle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Flower bud of a thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Leaves of bluebonnet (Lupinus) 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
 Flower of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Winter rosette of sow thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Back lit phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Shoot of box elder near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Blooming Engelmann s daisy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Young leaves of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Blooming thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Shoot and flowers of box elder in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
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