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2668-22. Giant ragweed (Ambrosia trifida) after application of herbicide that is causing it to wilt and shrivel in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020Similar picturesLarge thumbnails | Use small thumbnails | View as slideshow |
 Wilted giant ragweed (Ambrosia trifida) after application of a herbicide in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020  Distorted growth of giant ragweed (Ambrosia trifida) under 2,4-D Ester(?) herbicide in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023  Curled leaves of giant ragweed (Ambrosia trifida) under 2,4-D Ester(?) herbicide in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023  Wilted giant ragweed (Ambrosia trifida) under 2,4-D Ester(?) herbicide in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022  Flower buds of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020  Giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019  Giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022  Shoot of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021  Blooming giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012  Seedling of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022  Dry plant of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023  Shoot of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 27, 2021  Green flowers with pollen of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012  Purple bindweed and ragweed (Ambrosia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 28, 2022  Giant ragweed in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 9, 2012  Giant ragweed with curled leaves in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 28, 2022  Giant ragweed (Ambrosia trifida) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 26, 2023  Dry stem of giant ragweed (Ambrosia trifida) with fungus-like dots with white hair taken from Bee Creek Park. College Station, Texas, December 9, 2020  Giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020  Giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 18, 2020  Seeds of giant reed (Arundo donax) in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020  Flowers of giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 27, 2020  Giant reed (Arundo donax) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020  Close-up of giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020  Inflorescence of giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020  Emerging inflorescence of giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020  Flower spike of giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 27, 2020  Blooming giant ragweed (Ambrosia trifida) in Bee Creek Park. College Station, Texas, September 28, 2021  Giant ragweed (Ambrosia trifida) on Kiwanis Nature Trail. College Station, Texas, April 20, 2023  Blooming giant ragweed (Ambrosia trifida) in Lick Creek Park. College Station, Texas, September 22, 2021  Grasshopper sleeping on ragweed in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 6, 2012  Shoots of giant mustard (bastard cabbage, Rapistrum rugosum)(?) in a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024  Blooming giant mustard (bastard cabbage, Rapistrum rugosum) on a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023  Dry leaves of giant ragweed (Ambrosia trifida) in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, September 5, 2023  Dry plant of giant ragweed (Ambrosia trifida) in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, September 5, 2023  Giant ragweed (Ambrosia trifida) with half-white leaves at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, April 14, 2024  Giant reed (Arundo donax) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 22, 2022  Dry leaves of giant mustard (bastard cabbage, Rapistrum rugosum) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 8, 2012  Shoot of elm in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020  Phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020  Pink phlox 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  Blooming bluebonnet (Lupinus) 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  Field of bluebonnet (Lupinus) 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  Thorny winter rosette of a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020  Indian paintbrush (Castilleja indivisa) 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  Japanese honeysuckle (Lonicera japonica) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020  Eastern poison ivy (Toxicodendron radicans) 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  Details of Caloplaca lichen on a sandstone rock in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020  Blooming stemless spiderwort (Tradescantia subacaulis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020  Rush (Juncus) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020  Orange Caloplaca lichen on a sandstone rock in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020  Red flowers of Indian paintbrush (Castilleja indivisa) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020  Scaly brown Agaricus mushrooms in a forest in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020  Skeleton of a dry pad of prickly pears cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020  Blue flowes of spiderwort (Tradescantia) in prairie 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  Poison ivy near Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009  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  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 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  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  Some white five-petals flower on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020  Young leaves of eastern poison ivy (Toxicodendron radicans) 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  Close-up of resupinate polypore mushroom Physisporinus vitreus(?) 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  Sandstone rock with Caloplaca and Endocarpon pusillum lichens in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020  Back lit leaf of eastern poison ivy (Toxicodendron radicans) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 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  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  Green milkweed (Asclepias viridis) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 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  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  Flowers of Indian paintbrush (Castilleja indivisa) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 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  Green milkweed (Asclepias viridis) in bloom on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020  Showy evening primrose (Oenothera speciosa) on Wildflower Loop Trail 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  Resupinate polypore mushroom Physisporinus vitreus(?) covering a hackberry stump 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  Blooming green milkweed (Asclepias viridis) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020  Flower heads of green milkweed (Asclepias viridis) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020  Dried scaly stippled lichen (Endocarpon pusillum) with moss on sandstone rocks in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2020  Upper view of Indian paintbrush (Castilleja indivisa) on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2020 |