Butterfly on ragweed in Lick Creek Park. College Station, Texas, September 29, 2010
Butterfly sleeping on ragweed (Ambrosia) in Lick Creek Park. College Station, Texas, September 29, 2010
Pollinating greenish-yellow staminate blossoms of common ragweed (Ambrosia artemisiifolia) near Meyersville Road, with a silken strand from a spider mite. North from Chappell Hill, Texas, September 21, 2008
Ragweed (Ambrosia) in Lick Creek Park. College Station, Texas, October 3, 2008
Ragweed (Ambrosia) on Deer Run Trail in Lick Creek Park. College Station, Texas, September 30, 2008
Grasshopper sleeping on ragweed in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 6, 2012
Giant ragweed in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 9, 2012
Blooming giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Green flowers with pollen of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Growth of ragweed (Ambrosia) under power lines in Lake Bryan Park. Bryan, Texas, July 26, 2013
Ragweed (Ambrosia artemisiifolia) in Lick Creek Park. College Station, Texas, October 23, 2013
Common ragweed (Ambrosia artemisiifolia) on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 15, 2019
Wilted giant ragweed (Ambrosia trifida) after application of a herbicide in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2020
Common ragweed (Ambrosia artemisiifolia) on Forest Service Road 203 in Sam Houston National Forest. Texas, August 21, 2020
Leaves of common ragweed (Ambrosia artemisiifolia) on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, August 4, 2018
Common ragweed (Ambrosia artemisiifolia) on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, July 20, 2019
Giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
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
Salt moth caterpillar on a leaf of giant ragweed at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, April 5, 2020
Common ragweed (Ambrosia artemisiifolia) on Forest Service Road 203 in Sam Houston National Forest. Texas, July 12, 2020
Flower buds of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
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
Shoot of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
Galls (hollow blisters) on leaves of common ragweed (Ambrosia artemisiifolia) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 30, 2021
Galls (numerous pale green warts) on leaves of common ragweed (Ambrosia artemisiifolia) caused by eriophyid gall mites at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 30, 2021
Galls caused by eriophyid mites on leaves of common ragweed (Ambrosia artemisiifolia) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, August 3, 2021
Leaves of common ragweed (Ambrosia artemisiifolia) with galls caused by eriophyid mites at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, August 3, 2021
Distorted leaves of common ragweed (Ambrosia artemisiifolia) with galls caused by eriophyid mites at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, August 3, 2021
Leaves of common ragweed (Ambrosia artemisiifolia) damaged by eriophyid gall mites at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, August 3, 2021
Distorted leaves of common ragweed (Ambrosia artemisiifolia) with galls caused by eriophyid mites in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, August 25, 2021
Shoot of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 27, 2021
Blooming giant ragweed (Ambrosia trifida) in Lick Creek Park. College Station, Texas, September 22, 2021
Blooming giant ragweed (Ambrosia trifida) in Bee Creek Park. College Station, Texas, September 28, 2021
Leaf of giant ragweed(?) with frost near the creek in Bee Creek Park. College Station, Texas, January 4, 2022
Seedling of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
Dwarf dandelion (Krigia occidentalis) with giant ragweed at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, April 3, 2022
Giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
Common ragweed (Ambrosia artemisiifolia) at Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, June 9, 2022
Wilted giant ragweed (Ambrosia trifida) under 2,4-D Ester(?) herbicide in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
Common ragweed (Ambrosia artemisiifolia) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest. Texas, June 29, 2022
Common ragweed (Ambrosia artemisiifolia) on Forest Service Road 203 near Richards Loop Trail in Sam Houston National Forest near Montgomery. Texas, July 19, 2022
Purple bindweed and ragweed (Ambrosia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 28, 2022
Giant ragweed with curled leaves in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 28, 2022
Ragweed (Ambrosia artemisiifolia) in Lick Creek Park. College Station, Texas, September 29, 2022
Giant ragweed (Ambrosia trifida) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 26, 2023
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
Shoot of giant ragweed in Lick Creek Park. College Station, Texas, March 31, 2023
Giant ragweed (Ambrosia trifida) on Kiwanis Nature Trail. College Station, Texas, April 20, 2023
Dry plant of giant ragweed (Ambrosia trifida) in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, September 5, 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 Washington-on-the-Brazos State Historic Site. Washington, Texas, September 9, 2023
Common ragweed (Ambrosia artemisiifolia) in David E. Schob Nature Preserve at 906 Ashburn Street. College Station, Texas, April 1, 2024
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
