 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
 Eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Shoot of 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
 Young leaves of eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
 Dry plant of poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
 Dry seeds of poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
 Reddish young leaves of poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
 Poison ivy near Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
 Eastern poison ivy (Toxicodendron radicans) in Wolf Pen Creek Park. College Station, Texas, March 19, 2020
 Young leaf of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 15, 2009
 Tender leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
 Shoot of poison ivy on a hackberry tree 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
 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
 Eastern poison ivy (Toxicodendron radicans) in Wolf Pen Creek Park. College Station, Texas, April 19, 2020
 Blooming eastern poison ivy (Toxicodendron radicans) in Wolf Pen Creek Park. College Station, Texas, April 19, 2020
 Leaves of eastern poison ivy (Toxicodendron radicans) in Wolf Pen Creek Park. College Station, Texas, April 19, 2020
 Eastern poison ivy (Toxicodendron radicans) in Wolf Pen Creek Park. College Station, Texas, March 24, 2019
 Green leaves of eastern poison ivy (Toxicodendron radicans) in Wolf Pen Creek Park. College Station, Texas, April 19, 2020
 Eastern poison ivy (Toxicodendron radicans) in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, March 10, 2019
 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
 Blackberry in poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 5, 2022
 Green berries of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 22, 2022
 Berries of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 1, 2009
 Shoot of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Back lit leaf of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 27, 2012
 Dying poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 6, 2011
 Berries of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 3, 2008
 Blooming poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
 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
 Fall colors of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 2009
 Fresh leaves of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
 Reddish shoot of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Green berries of poison ivy on Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 16, 2009
 Early fall color of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 30, 2008
 Young plants of eastern poison ivy (Toxicodendron radicans) on Four Notch Loop Trail of Sam Houston National Forest near Huntsville. Texas, March 23, 2019
 Blooming eastern swamp privet (Forestiera acuminata var. vestita) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Shoot of elm in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Pink phlox in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 White flowers of dewberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Corn salad (Valerianella) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Red sage (Salvia coccinea(?)) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Flowers of bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Blooming bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Field of bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Stemless spiderwort (Tradescantia subacaulis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Thorny winter rosette of a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Japanese honeysuckle (Lonicera japonica) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Indian paintbrush (Castilleja indivisa) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Blue flowers of spiderwort (Tradescantia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Cockleshell mushrooms Lentinellus castoreus on an oak log in red cedar forest Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 2, 2020
 Blue flowes of spiderwort (Tradescantia) in prairie in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Details of Caloplaca lichen on a sandstone rock in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020
 Orange Caloplaca lichen on a sandstone rock in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020
 Scaly brown Agaricus mushrooms in a forest in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Rush (Juncus) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Blooming stemless spiderwort (Tradescantia subacaulis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Skeleton of a dry pad of prickly pears cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Red flowers of Indian paintbrush (Castilleja indivisa) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Dry pad skeleton of prickly pears cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Bluebonnets 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
 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 bluebonnets 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
 Firedot lichen Caloplaca on limestone outcrop near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
 Close-up of blue flowes of spiderwort (Tradescantia) in prairie in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Some white five-petals flower on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Blue flowers of stemless spiderwort (Tradescantia subacaulis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Close-up of resupinate polypore mushroom Physisporinus vitreus(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Dissected scaly brown Agaricus mushrooms in a forest in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Caloplaca and a lichen Endocarpon pusillum on a sandstone rock in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020
 Sandstone rock with Caloplaca and Endocarpon pusillum lichens in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020
 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
 Resupinate polypore mushroom Physisporinus vitreus(?) on a hackberry stump in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Green milkweed (Asclepias viridis) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Wilted giant ragweed (Ambrosia trifida) after application of a herbicide in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020
 Caloplaca together with a black lichen Endocarpon pusillum on a sandstone rock in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020
 Pepper-like lichen Sarcogyne regularis(?) on a sandstone rock in prairie in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Pepper-like lichen Sarcogyne regularis(?) with black cyanobacteria on sandstone in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Details of resupinate polypore mushroom Physisporinus vitreus(?) on a hackberry stump in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Rosette of a plant of annual bastard cabbage (Rapistrum rugosum) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Showy evening primrose (Oenothera speciosa) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Flowers of Indian paintbrush (Castilleja indivisa) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Flowers of green milkweed (Asclepias viridis) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Fresh leaves of annual bastard cabbage (Rapistrum rugosum) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020
 Blooming green milkweed (Asclepias viridis) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Resupinate polypore mushroom Physisporinus vitreus(?) covering a hackberry stump in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Green milkweed (Asclepias viridis) in bloom on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020
 Corticioid fungus Dendrothele nivosa on bark of Eastern red cedar (Juniper) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
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