![](../../pictures/archives/compress/2020/2766/jpeg/07t.jpg) Close-up of giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2020/2793/jpeg/24t.jpg) Flowers of giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 27, 2020
![](../../pictures/archives/compress/2020/2766/jpeg/06t.jpg) Inflorescence of giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2020/2793/jpeg/23t.jpg) Flower spike of giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 27, 2020
![](../../pictures/archives/compress/2020/2766/jpeg/08t.jpg) Emerging inflorescence of giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2020/2803/jpeg/06t.jpg) Giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 18, 2020
![](../../pictures/archives/compress/2020/2814/jpeg/11t.jpg) Giant reed (Arundo donax) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
![](../../pictures/archives/compress/2020/2814/jpeg/22t.jpg) Seeds of giant reed (Arundo donax) in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
![](../../pictures/archives/compress/2022/3195/jpeg/06t.jpg) Giant reed (Arundo donax) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 22, 2022
![](../../pictures/archives/compress/2020/2814/jpeg/01t.jpg) Giant reed (Arundo donax) in Bee Creek Park. College Station, Texas, November 11, 2020
![](../../pictures/archives/compress/2020/2827/jpeg/05t.jpg) Giant reed (Arundo donax) near the creek in Bee Creek Park. College Station, Texas, December 9, 2020
![](../../pictures/archives/compress/2020/2766/jpeg/03t.jpg) Flower buds of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2023/3364/jpeg/12t.jpg) Blooming giant mustard (bastard cabbage, Rapistrum rugosum) on a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
![](../../pictures/archives/compress/2024/3480/jpeg/21t.jpg) 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
![](../../pictures/archives/compress/2012/1125/jpeg/17t.jpg) 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
![](../../pictures/archives/compress/2020/2766/jpeg/13t.jpg) Shoot of amaranth near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2020/2766/jpeg/01t.jpg) Amaranth flowers near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2020/2766/jpeg/12t.jpg) Rattlebush (Sesbania drummondii) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2020/2793/jpeg/22t.jpg) Mat of Carolina ponysfoot (Dichondra carolinensis) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 27, 2020
![](../../pictures/archives/compress/2020/2766/jpeg/11t.jpg) Sprawling signalgrass (Urochloa reptans) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2020/2766/jpeg/02t.jpg) Balloon Vine (Cardiospermum halicacabum) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2020/2766/jpeg/09t.jpg) Inflorescence of sprawling signalgrass (Urochloa reptans) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2020/2766/jpeg/10t.jpg) Leaves and flowrs of sprawling signalgrass (Urochloa reptans) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2022/3252/jpeg/13t.jpg) Giant ragweed with curled leaves in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 28, 2022
![](../../pictures/archives/compress/2019/2565/jpeg/02t.jpg) Giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2020/2668/jpeg/21t.jpg) Wilted giant ragweed (Ambrosia trifida) after application of a herbicide in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020
![](../../pictures/archives/compress/2012/1101/jpeg/25t.jpg) Blooming giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
![](../../pictures/archives/compress/2023/3414/jpeg/14t.jpg) Dry plant of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
![](../../pictures/archives/compress/2020/2794/jpeg/19t.jpg) Small White Morning Glory (Pitted Morningglory, Ipomoea lacunosa) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 27, 2020
![](../../pictures/archives/compress/2012/1101/jpeg/26t.jpg) Green flowers with pollen of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
![](../../pictures/archives/compress/2020/2668/jpeg/22t.jpg) 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, 2020
![](../../pictures/archives/compress/2020/2814/jpeg/10t.jpg) Area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
![](../../pictures/archives/compress/2020/2836/jpeg/01t.jpg) Dry vegetation near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 25, 2020
![](../../pictures/archives/compress/2020/2836/jpeg/02t.jpg) Trail behind a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 25, 2020
![](../../pictures/archives/compress/2020/2736/jpeg/25t.jpg) Some leafy shoot near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 4, 2020
![](../../pictures/archives/compress/2020/2803/jpeg/02t.jpg) Amaranth plant in a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 18, 2020
![](../../pictures/archives/compress/2020/2814/jpeg/13t.jpg) Weeds in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
![](../../pictures/archives/compress/2020/2803/jpeg/03t.jpg) Smartweed (Persicaria, Polygonum) in a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 18, 2020
![](../../pictures/archives/compress/2020/2754/jpeg/12t.jpg) Shoot of Amaranth in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 15, 2020
![](../../pictures/archives/compress/2020/2814/jpeg/21t.jpg) Goldenrod (Solidago) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
![](../../pictures/archives/compress/2020/2803/jpeg/04t.jpg) Flowers of smartweed (Persicaria, Polygonum) in a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 18, 2020
![](../../pictures/archives/compress/2020/2803/jpeg/05t.jpg) Blooming smartweed (Persicaria, Polygonum) in a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 18, 2020
![](../../pictures/archives/compress/2012/1101/jpeg/22t.jpg) Orange butterfly near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
![](../../pictures/archives/compress/2012/1101/jpeg/17t.jpg) Some blooming plant near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
![](../../pictures/archives/compress/2012/1106/jpeg/23t.jpg) Foggy sunrise over a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 23, 2012
![](../../pictures/archives/compress/2020/2809/jpeg/12t.jpg) Balloon vine (Cardiospermum halicacabum) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
![](../../pictures/archives/compress/2020/2662/jpeg/15t.jpg) Firedot lichen Caloplaca on limestone outcrop near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 13, 2020
![](../../pictures/archives/compress/2020/2754/jpeg/15t.jpg) Blooming johnsongrass (Sorghum halepense) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 15, 2020
![](../../pictures/archives/compress/2020/2754/jpeg/13t.jpg) Blooming rattlebush (Sesbania drummondii) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 15, 2020
![](../../pictures/archives/compress/2020/2742/jpeg/12t.jpg) Batterfly on a thistle flower (Cirsium) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2020
![](../../pictures/archives/compress/2020/2814/jpeg/12t.jpg) Creeping lovegrass (Eragrostis reptans) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
![](../../pictures/archives/compress/2020/2809/jpeg/13t.jpg) Mexican hat flower (Ratibida columnaris) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
![](../../pictures/archives/compress/2020/2742/jpeg/19t.jpg) Winged loosestrife (Lythrum alatum) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2020
![](../../pictures/archives/compress/2012/1101/jpeg/23t.jpg) Powderpuff (Mimosa strigillosa) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
![](../../pictures/archives/compress/2012/1101/jpeg/19t.jpg) Turnsole (Heliotropium indicum) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
![](../../pictures/archives/compress/2012/1067/jpeg/24t.jpg) Giant ragweed in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 9, 2012
![](../../pictures/archives/compress/2020/2631/jpeg/15t.jpg) Prickly pears (Opuntia) on exposed limestone rocks near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 18, 2020
![](../../pictures/archives/compress/2020/2742/jpeg/10t.jpg) Seeds of Johnson grass (Sorghum halepense) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2020
![](../../pictures/archives/compress/2020/2814/jpeg/19t.jpg) Blooming creeping lovegrass (Eragrostis reptans) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
![](../../pictures/archives/compress/2020/2742/jpeg/11t.jpg) Inflorescense of Johnson grass (Sorghum halepense) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2020
![](../../pictures/archives/compress/2020/2742/jpeg/14t.jpg) Shoot of balloon vine (Cardiospermum halicacabum) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2020
![](../../pictures/archives/compress/2020/2631/jpeg/10t.jpg) Orange Dacrymyces(?) mushrooms on a small dried tree in a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 18, 2020
![](../../pictures/archives/compress/2020/2809/jpeg/14t.jpg) Blooming Mexican hat flower (Ratibida columnaris) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
![](../../pictures/archives/compress/2012/1101/jpeg/20t.jpg) Yerba de Tajo (Eclipta prostrata) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
![](../../pictures/archives/compress/2019/2565/jpeg/03t.jpg) Coffeeweed (Sesbania herbacea) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2012/1106/jpeg/24t.jpg) Balloon Vine (Cardiospermum halicacabum) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 23, 2012
![](../../pictures/archives/compress/2012/1101/jpeg/21t.jpg) Horse apple (osage orange) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
![](../../pictures/archives/compress/2022/3133/jpeg/01t.jpg) Giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
![](../../pictures/archives/compress/2020/2631/jpeg/11t.jpg) Orange Dacrymyces(?) mushrooms on bark of a small dried tree in a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 18, 2020
![](../../pictures/archives/compress/2020/2814/jpeg/17t.jpg) Female inflorescence of creeping lovegrass (Eragrostis reptans) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
![](../../pictures/archives/compress/2020/2814/jpeg/14t.jpg) Female flowers of creeping lovegrass (Eragrostis reptans) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
![](../../pictures/archives/compress/2020/2654/jpeg/02t.jpg) 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
![](../../pictures/archives/compress/2020/2809/jpeg/10t.jpg) Groundsel bush (seepwillow, Baccharis halimifolia) with seeds in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
![](../../pictures/archives/compress/2020/2654/jpeg/01t.jpg) 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
![](../../pictures/archives/compress/2012/1101/jpeg/24t.jpg) Close up of horse apple (osage orange) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
![](../../pictures/archives/compress/2019/2565/jpeg/01t.jpg) Climbing hempvine (Mikania scandens) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2012/1101/jpeg/15t.jpg) Flowers of balloon vine (Cardiospermum halicacabum) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
![](../../pictures/archives/compress/2021/2909/jpeg/09t.jpg) Shoot of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
![](../../pictures/archives/compress/2021/3013/jpeg/14t.jpg) Shoot of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 27, 2021
![](../../pictures/archives/compress/2022/3109/jpeg/02t.jpg) Seedling of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
![](../../pictures/archives/compress/2008/672/jpeg/21t.jpg) Horse apple (osage orange, green brains) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 21, 2008
![](../../pictures/archives/compress/2008/672/jpeg/22t.jpg) Violet wood sorrel (shamrock, Oxalis violacea?) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 21, 2008
![](../../pictures/archives/compress/2012/1101/jpeg/16t.jpg) Back lit flowers of balloon vine (Cardiospermum halicacabum) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
![](../../pictures/archives/compress/2022/3230/jpeg/26t.jpg) Puffball mushrooms Calvatia cyathiformis on open space near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2022
![](../../pictures/archives/compress/2020/2814/jpeg/15t.jpg) Close-up of female flowers of creeping lovegrass (Eragrostis reptans) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
![](../../pictures/archives/compress/2020/2631/jpeg/12t.jpg) Orange Dacrymyces(?) mushrooms on barkless section of a small dried tree in a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 18, 2020
![](../../pictures/archives/compress/2020/2809/jpeg/11t.jpg) Fluffy seeds of groundsel bush (seepwillow, Baccharis halimifolia) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2020
![](../../pictures/archives/compress/2020/2814/jpeg/16t.jpg) Details of female flowers of creeping lovegrass (Eragrostis reptans) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
![](../../pictures/archives/compress/2020/2814/jpeg/18t.jpg) Side view of a female inflorescence of creeping lovegrass (Eragrostis reptans) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 12, 2020
![](../../pictures/archives/compress/2022/3179/jpeg/12t.jpg) Wilted giant ragweed (Ambrosia trifida) under 2,4-D Ester(?) herbicide in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
![](../../pictures/archives/compress/2023/3373/jpeg/08t.jpg) 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
![](../../pictures/archives/compress/2023/3373/jpeg/09t.jpg) 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
![](../../pictures/archives/compress/2020/2766/jpeg/14t.jpg) Croton glandulosus in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2020/2742/jpeg/13t.jpg) Bigpod Sesbania (Sesbania herbacea) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2020
![](../../pictures/archives/compress/2020/2794/jpeg/10t.jpg) Fibrecap (Inocybe) mushrooms in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 27, 2020
![](../../pictures/archives/compress/2020/2793/jpeg/08t.jpg) Agaricus mushrooms under oak and elm trees in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 27, 2020
![](../../pictures/archives/compress/2020/2766/jpeg/18t.jpg) Red lovegrass (Eragrostis secundiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
![](../../pictures/archives/compress/2020/2754/jpeg/02t.jpg) Creeping lovegrass (Eragrostis reptans, Neeragrostis reptans) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 15, 2020
![](../../pictures/archives/compress/2020/2742/jpeg/18t.jpg) Fresh leaves of bigpod Sesbania (Sesbania herbacea) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2020
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