 Poison ivy near Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Early fall color of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 30, 2008
 Shoot of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 Berries of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 1, 2009
 Young leaf of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 15, 2009
 Green berries of poison ivy on Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 16, 2009
 Blooming poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 1, 2010
 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, April 17, 2022
 Green berries of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 22, 2022
 Dying poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 6, 2011
 Blooming poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
 Berries of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 3, 2008
 Back lit leaf of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 27, 2012
 Reddish shoot of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Tender leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Back lit shoot of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Young leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Fresh leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Tender pink leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Tender young leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Dry plant of poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Shoot of poison ivy on a hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Dry seeds of poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
 A pond from a dam in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 13, 2009
 Young leaves of poison ivy on hackberry tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2021
 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
 Dry leaf near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 13, 2009
 Trail through a forest in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 2009
 Foggy pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 13, 2009
 Forest near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 13, 2009
 A pond at morning in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 13, 2009
 A pond at sunrise in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 13, 2009
 A pond from a dam at sunrise in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 13, 2009
 Forest in mist in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 2009
 Loop trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 2009
 Lichen on loop trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 2009
 Vines on loop trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 2009
 Loop trail in mist in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 2009
 Loop trail at morning in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 2009
 Red berries of yaupon holly in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 2009
 Young leaves of eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Young leaves of eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Back lit leaf of eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Reddish young leaves of poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
 Yaupon holly on loop trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 2009
 Bluebonnets at Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Field of bluebonnets at Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Wildflowers in mist at Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Field of wildflowers at Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Field of wildflowers in mist at Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 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 at Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Fruit of osage orange on a picnic table near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 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
 Photographer with a tripod taking pictures of a field of bluebonnets at Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 4, 2009
 Brown colors of a recently dried Eastern red cedar tree (Juniperus virginiana) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 20, 2024
 Leaf eating Fall Webworm caterpillars (Hyphantria cunea) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
 Violet Wood Sorrel (Oxalis violacea) in dew blooming at fall without leaves in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 20, 2013
 Magnolia flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
 Ripening dewberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 16, 2009
 Butterfly in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 19, 2009
 Pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 24, 2009
 Mistletoe in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 12, 2009
 Dam of a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 24, 2009
 Flower of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 Young Fall Webworm caterpillars (Hyphantria cunea) on boxelder (ashleaf maple) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
 White magnolia flower 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 3, 2009
 Forest near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 24, 2009
 Green leaves of magnolia in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
 Pond at morning in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 24, 2009
 Berries of mistletoe in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 12, 2009
 Pond at morning in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Turtle on Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 16, 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
 False dandelion with a bee in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 4, 2009
 Slender vervain (verbena) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 24, 2009
 Horse nettle(?) (Solanum) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
 Field of wildflowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2009
 Carriage in mist in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Close up of a butterfly in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 19, 2009
 Milkweed seeds in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 6, 2009
 Forest near a pond dam in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Robber Fly (Laphria) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 1, 2009
 Old Ferry Road in mist in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Flower of an apple-like tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 15, 2009
 Apple-like tree in bloom in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 15, 2009
 Heavy dew near loop trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 24, 2009
 Stork s bill (geranium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 8, 2009
 Pineywoods cow on Barrington Farm in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 13, 2009
 Engelmann s daisy (Engelmannia pinnatifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
 Powderpuff (Mimosa strigillosa) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 23, 2009
 Dwarf dandelion (Krigia occidentalis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
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