![](../../pictures/archives/compress/2021/2898/jpeg/35t.jpg) Prickly flower buds of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
![](../../pictures/archives/compress/2023/3373/jpeg/05t.jpg) Prickly flower buds of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
![](../../pictures/archives/compress/2023/3373/jpeg/07t.jpg) Prickly flower buds on a shoot of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
![](../../pictures/archives/compress/2023/3382/jpeg/23t.jpg) Flower buds of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
![](../../pictures/archives/compress/2011/936/jpeg/16t.jpg) Flower buds of Bull nettle (mala mujer, Cnidoscolus texanus) armed with stinging hairs in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 30, 2011
![](../../pictures/archives/compress/2022/3133/jpeg/23t.jpg) Bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
![](../../pictures/archives/compress/2023/3356/jpeg/06t.jpg) Flower buds of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
![](../../pictures/archives/compress/2010/856/jpeg/16t.jpg) Flower buds of Bull nettle (mala mujer, Cnidoscolus texanus) armed with stinging hairs in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 1, 2010
![](../../pictures/archives/compress/2022/3157/jpeg/09t.jpg) Fruits bull nettle (Cnidoscolus texanus) collected in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 22, 2022
![](../../pictures/archives/compress/2022/3179/jpeg/04t.jpg) Bull nettle (Cnidoscolus texanus) on a sandy road in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
![](../../pictures/archives/compress/2021/2907/jpeg/09t.jpg) Bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
![](../../pictures/archives/compress/2018/2244/jpeg/09t.jpg) Bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
![](../../pictures/archives/compress/2021/2914/jpeg/28t.jpg) Bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2021
![](../../pictures/archives/compress/2018/2244/jpeg/14t.jpg) Blooming bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
![](../../pictures/archives/compress/2021/2907/jpeg/14t.jpg) Bull nettle (Cnidoscolus texanus) in bloom in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
![](../../pictures/archives/compress/2021/2907/jpeg/11t.jpg) Flower of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
![](../../pictures/archives/compress/2012/1046/jpeg/14t.jpg) Blooming Bull Nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2012
![](../../pictures/archives/compress/2022/3179/jpeg/01t.jpg) Chlorosis (yellowing of leaves) of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
![](../../pictures/archives/compress/2012/1046/jpeg/15t.jpg) White flowers of Bull Nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2012
![](../../pictures/archives/compress/2018/2244/jpeg/13t.jpg) White flowers of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
![](../../pictures/archives/compress/2021/2907/jpeg/22t.jpg) Close-up of a flower of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
![](../../pictures/archives/compress/2018/2244/jpeg/15t.jpg) Bull nettle (Cnidoscolus texanus) and pink phlox in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
![](../../pictures/archives/compress/2021/2909/jpeg/18t.jpg) White flowers of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
![](../../pictures/archives/compress/2021/2907/jpeg/23t.jpg) White flowers of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
![](../../pictures/archives/compress/2012/1044/jpeg/12t.jpg) Bull nettle (Mala mujer, Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
![](../../pictures/archives/compress/2022/3185/jpeg/03t.jpg) Yellowing of leaf tissue (chlorosis) of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 2, 2022
![](../../pictures/archives/compress/2008/637/jpeg/22t.jpg) Bull nettle (Mala mujer, Cnidoscolus texanus) flower with immature katydid in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
![](../../pictures/archives/compress/2020/2703/jpeg/24t.jpg) Leaves of Bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2020
![](../../pictures/archives/compress/2021/2889/jpeg/19t.jpg) Bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
![](../../pictures/archives/compress/2021/3013/jpeg/05t.jpg) Bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 27, 2021
![](../../pictures/archives/compress/2014/1476/jpeg/13t.jpg) Bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 8, 2014
![](../../pictures/archives/compress/2019/2558/jpeg/11t.jpg) Bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 10, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/12t.jpg) Bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/07t.jpg) Bull Nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2020/2703/jpeg/23t.jpg) Fruit of Bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2020
![](../../pictures/archives/compress/2024/3499/jpeg/12t.jpg) Bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 26, 2024
![](../../pictures/archives/compress/2008/644/jpeg/16t.jpg) Bull nettle (Mala mujer, Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 18, 2008
![](../../pictures/archives/compress/2023/3373/jpeg/17t.jpg) Blooming bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
![](../../pictures/archives/compress/2023/3364/jpeg/11t.jpg) Flowers of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
![](../../pictures/archives/compress/2009/741/jpeg/26t.jpg) Bull nettle (mala mujer, Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
![](../../pictures/archives/compress/2023/3356/jpeg/04t.jpg) Young plant of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
![](../../pictures/archives/compress/2014/1466/jpeg/05t.jpg) Bull nettle (mala mujer, Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2014
![](../../pictures/archives/compress/2021/3013/jpeg/11t.jpg) White flowers of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 27, 2021
![](../../pictures/archives/compress/2023/3373/jpeg/06t.jpg) White flowers of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
![](../../pictures/archives/compress/2023/3373/jpeg/15t.jpg) White flower of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
![](../../pictures/archives/compress/2009/742/jpeg/02t.jpg) Flowers of Bull nettle (mala mujer, Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
![](../../pictures/archives/compress/2012/1075/jpeg/03t.jpg) Bull nettle (mala mujer, Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 1, 2012
![](../../pictures/archives/compress/2023/3364/jpeg/18t.jpg) White flower of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
![](../../pictures/archives/compress/2023/3364/jpeg/08t.jpg) Young leaves of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 14, 2023
![](../../pictures/archives/compress/2008/648/jpeg/07t.jpg) Bull nettle (mala mujer, Cnidoscolus texanus) flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 31, 2008
![](../../pictures/archives/compress/2023/3373/jpeg/21t.jpg) Spider on white flowers of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
![](../../pictures/archives/compress/2023/3356/jpeg/05t.jpg) Young folded leaf of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
![](../../pictures/archives/compress/2010/858/jpeg/05t.jpg) Fruit of Bull nettle (Cnidoscolus texanus) armed with stinging hairs in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2010
![](../../pictures/archives/compress/2008/648/jpeg/06t.jpg) Bull nettle (mala mujer, Cnidoscolus texanus) armed with stinging hairs in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 31, 2008
![](../../pictures/archives/compress/2023/3373/jpeg/22t.jpg) Large shoot of bull nettle (Cnidoscolus texanus) in shade under live oaks in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
![](../../pictures/archives/compress/2008/625/jpeg/15t.jpg) Bull nettle (mala mujer, Cnidoscolus texanus) flowers in Washington-on-the-Brazos Historic Site. Washington, Texas, March 30, 2008
![](../../pictures/archives/compress/2022/3159/jpeg/21t.jpg) Nuts of bull nettle (Cnidoscolus texanus) collected in Washington-on-the-Brazos two days before. College Station, Texas, May 24, 2022
![](../../pictures/archives/compress/2022/3137/jpeg/13t.jpg) Firewheel and bull nettle in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
![](../../pictures/archives/compress/2022/3137/jpeg/12t.jpg) Indian paintbrush and bull nettle in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
![](../../pictures/archives/compress/2022/3137/jpeg/15t.jpg) Engelmann daisy and bull nettle in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
![](../../pictures/archives/compress/2022/3137/jpeg/14t.jpg) Firewheel and bull nettle flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
![](../../pictures/archives/compress/2022/3159/jpeg/22t.jpg) Close-up of seeds of bull nettle (Cnidoscolus texanus) collected in Washington-on-the-Brazos two days before. College Station, Texas, May 24, 2022
![](../../pictures/archives/compress/2009/729/jpeg/23t.jpg) Crab spider on a white flower of bull nettle in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 4, 2009
![](../../pictures/archives/compress/2008/644/jpeg/15t.jpg) Bull nettle flowers with a caterpillar(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 18, 2008
![](../../pictures/archives/compress/2020/2698/jpeg/25t.jpg) Alyssum like flower with bull nettle on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2020
![](../../pictures/archives/compress/2008/657/jpeg/08t.jpg) Green lynx spider on bull nettle near Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 12, 2008
![](../../pictures/archives/compress/2008/657/jpeg/16t.jpg) Green lynx spider on bull nettle (mala mujer) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 12, 2008
![](../../pictures/archives/compress/2021/2900/jpeg/03t.jpg) Bull nettle (Cnidoscolus texanus) with flower buds at Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, April 4, 2021
![](../../pictures/archives/compress/2022/3125/jpeg/07t.jpg) Leaves of prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 4, 2022
![](../../pictures/archives/compress/2022/3132/jpeg/23t.jpg) Prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
![](../../pictures/archives/compress/2022/3137/jpeg/01t.jpg) White prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
![](../../pictures/archives/compress/2022/3133/jpeg/04t.jpg) Dry pad skeleton of prickly pear cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
![](../../pictures/archives/compress/2022/3137/jpeg/02t.jpg) Flowers of white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
![](../../pictures/archives/compress/2022/3137/jpeg/04t.jpg) Blooming white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
![](../../pictures/archives/compress/2022/3132/jpeg/24t.jpg) Vegetative shoot of prickly pear cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
![](../../pictures/archives/compress/2022/3133/jpeg/05t.jpg) Texture of a pad skeleton of prickly pear cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
![](../../pictures/archives/compress/2022/3132/jpeg/21t.jpg) Flower of prickly poppy (Argemone albiflora) with a beetle in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 17, 2022
![](../../pictures/archives/compress/2022/3137/jpeg/05t.jpg) Upper view of white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
![](../../pictures/archives/compress/2022/3137/jpeg/03t.jpg) Hover fly (syrphid) on a flower of w hite prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2022
![](../../pictures/archives/compress/2022/3103/jpeg/14t.jpg) Heartleaf nettle (Urtica chamaedryoides) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 30, 2022
![](../../pictures/archives/compress/2022/3108/jpeg/24t.jpg) Basal leaves of bull thistle(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
![](../../pictures/archives/compress/2022/3156/jpeg/22t.jpg) Pad of prickly pears (Opuntia) with a bug in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 22, 2022
![](../../pictures/archives/compress/2022/3109/jpeg/11t.jpg) Leaves of bull thistle (Cirsium horridulum) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
![](../../pictures/archives/compress/2022/3195/jpeg/08t.jpg) Dry skeleton of prickly peas cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 22, 2022
![](../../pictures/archives/compress/2008/628/jpeg/15t.jpg) Bull nettle (Cnidoscolus texanus) in Old Baylor Park. Independence, Texas, April 6, 2008
![](../../pictures/archives/compress/2022/3109/jpeg/12t.jpg) Rosette of leaves of bull thistle (Cirsium horridulum) in area of a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
![](../../pictures/archives/compress/2022/3195/jpeg/07t.jpg) Rusty pads of prickly peas cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 22, 2022
![](../../pictures/archives/compress/2022/3179/jpeg/18t.jpg) Prickly seeds of wild carrot (Daucus pusillus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 20, 2022
![](../../pictures/archives/compress/2008/631/jpeg/07t.jpg) White prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2008
![](../../pictures/archives/compress/2008/637/jpeg/23t.jpg) Prickly poppy flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
![](../../pictures/archives/compress/2012/1046/jpeg/17t.jpg) White prickly poppy in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 24, 2012
![](../../pictures/archives/compress/2022/3119/jpeg/07t.jpg) Flower buds of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2022
![](../../pictures/archives/compress/2022/3114/jpeg/02t.jpg) Flower buds of woolly-white (Hymenopappus artemisiaefolius) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
![](../../pictures/archives/compress/2022/3185/jpeg/02t.jpg) Late blooming white prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 2, 2022
![](../../pictures/archives/compress/2018/2244/jpeg/02t.jpg) White prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
![](../../pictures/archives/compress/2018/2248/jpeg/08t.jpg) White prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 21, 2018
![](../../pictures/archives/compress/2012/1044/jpeg/11t.jpg) White prickly poppy (Argemone albiflora) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
![](../../pictures/archives/compress/2008/637/jpeg/21t.jpg) Prickly poppy flower with immature katydid in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
![](../../pictures/archives/compress/2011/936/jpeg/18t.jpg) Blooming prickly pears cactus (Opuntia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 30, 2011
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