![](../../pictures/archives/compress/2022/3114/jpeg/13t.jpg) Basal rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
![](../../pictures/archives/compress/2021/2865/jpeg/02t.jpg) Basal rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 8, 2021
![](../../pictures/archives/compress/2020/2665/jpeg/14t.jpg) Basal rosette of leaves of evening primrose (Oenothera)(?) on a recent cutting in Lick Creek Park. College Station, Texas, March 15, 2020
![](../../pictures/archives/compress/2023/3354/jpeg/23t.jpg) Rosette of hairy leaves of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023
![](../../pictures/archives/compress/2023/3368/jpeg/21t.jpg) Squaw-weed (Senecio ampullaceus) in Lick Creek Park. College Station, Texas, March 20, 2023
![](../../pictures/archives/compress/2023/3368/jpeg/20t.jpg) Squaw-weed flowers (Senecio ampullaceus) in Lick Creek Park. College Station, Texas, March 20, 2023
![](../../pictures/archives/compress/2023/3368/jpeg/22t.jpg) Flower buds of squaw-weed (Senecio ampullaceus) in Lick Creek Park. College Station, Texas, March 20, 2023
![](../../pictures/archives/compress/2024/3478/jpeg/08t.jpg) Leaves of squaw-weed (Senecio ampullaceus) in Bee Creek Park. College Station, Texas, February 26, 2024
![](../../pictures/archives/compress/2021/2871/jpeg/24t.jpg) Basal leaves of squaw-weed (Senecio ampullaceus) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, February 24, 2021
![](../../pictures/archives/compress/2023/3368/jpeg/23t.jpg) Underside of leaves of squaw-weed (Senecio ampullaceus) with sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) in Lick Creek Park. College Station, Texas, March 20, 2023
![](../../pictures/archives/compress/2023/3368/jpeg/24t.jpg) Close-up of underside of leaves of squaw-weed (Senecio ampullaceus) with sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) in Lick Creek Park. College Station, Texas, March 20, 2023
![](../../pictures/archives/compress/2024/3483/jpeg/04t.jpg) Flower buds of squaw-weed (Senecio ampullaceus) in Anderson Arboretum in Bee Creek Park. College Station, March 7, 2024
![](../../pictures/archives/compress/2023/3340/jpeg/01t.jpg) Rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
![](../../pictures/archives/compress/2021/2857/jpeg/10t.jpg) Rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
![](../../pictures/archives/compress/2021/2857/jpeg/11t.jpg) Winter rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
![](../../pictures/archives/compress/2023/3355/jpeg/01t.jpg) Flower buds and young leaves of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023
![](../../pictures/archives/compress/2023/3354/jpeg/11t.jpg) Flower buds and young leaves of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023
![](../../pictures/archives/compress/2024/3473/jpeg/24t.jpg) Leaves of squaw-weed (Senecio ampullaceus) with sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) on Yaupon Loop Trail in Lick Creek Park. College Station, Texas, February 17, 2024
![](../../pictures/archives/compress/2022/3117/jpeg/12t.jpg) Winter rosette of squaw-weed (Senecio ampullaceus) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 12, 2022
![](../../pictures/archives/compress/2024/3509/jpeg/07t.jpg) Gall from underside of a leaf of squaw-weed (Senecio ampullaceus) in Bee Creek Park. College Station, Texas, April 9, 2024
![](../../pictures/archives/compress/2023/3328/jpeg/12t.jpg) Leaves of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 16, 2023
![](../../pictures/archives/compress/2023/3343/jpeg/29t.jpg) Leaves of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, February 15, 2023
![](../../pictures/archives/compress/2024/3473/jpeg/33t.jpg) Spores (in lugol) of sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) from white spots on leaves of squaw-weed (Senecio ampullaceus) collected on Yaupon Loop Trail in Lick Creek Park. College Station, Texas, February 17, 2024
![](../../pictures/archives/compress/2024/3473/jpeg/32t.jpg) Spores (in Congo Red) of sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) from white spots on leaves of squaw-weed (Senecio ampullaceus) collected on Yaupon Loop Trail in Lick Creek Park. College Station, Texas, February 17, 2024
![](../../pictures/archives/compress/2024/3473/jpeg/31t.jpg) Spores and tissues (at low magnification) of sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) from white spots on leaves of squaw-weed (Senecio ampullaceus) collected on Yaupon Loop Trail in Lick Creek Park. College Station, Texas, February 17, 2024
![](../../pictures/archives/compress/2024/3501/jpeg/12t.jpg) Squaw-weed flowers (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 29, 2024
![](../../pictures/archives/compress/2023/3355/jpeg/02t.jpg) Flower buds of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023
![](../../pictures/archives/compress/2023/3354/jpeg/05t.jpg) Flower buds of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023
![](../../pictures/archives/compress/2023/3354/jpeg/10t.jpg) Unfolding flowers of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023
![](../../pictures/archives/compress/2023/3448/jpeg/11t.jpg) Leaves of squaw-weed (Senecio ampullaceus) on Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, December 21, 2023
![](../../pictures/archives/compress/2023/3350/jpeg/03t.jpg) Hairy leaves of squaw-weed (Senecio ampullaceus) at Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, February 26, 2023
![](../../pictures/archives/compress/2022/3109/jpeg/08t.jpg) Leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
![](../../pictures/archives/compress/2024/3457/jpeg/13t.jpg) Leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
![](../../pictures/archives/compress/2023/3339/jpeg/12t.jpg) Unfolding leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
![](../../pictures/archives/compress/2023/3356/jpeg/21t.jpg) Leaves of squaw-weed (Senecio ampullaceus) with light yellow areas on leaves caused by sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
![](../../pictures/archives/compress/2021/2895/jpeg/12t.jpg) Squaw-weed (Senecio ampullaceus) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 29, 2021
![](../../pictures/archives/compress/2021/2885/jpeg/08t.jpg) Flower buds of squaw-weed (Senecio ampullaceus) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 18, 2021
![](../../pictures/archives/compress/2023/3356/jpeg/02t.jpg) Squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
![](../../pictures/archives/compress/2020/2665/jpeg/13t.jpg) Basal rosette of leaves of some plant in Lick Creek Park. College Station, Texas, March 15, 2020
![](../../pictures/archives/compress/2022/3119/jpeg/10t.jpg) Blooming squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2022
![](../../pictures/archives/compress/2021/2888/jpeg/13t.jpg) Blooming squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
![](../../pictures/archives/compress/2008/621/jpeg/24t.jpg) Squaw-weed flower (Senecio ampullaceus) in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2008
![](../../pictures/archives/compress/2019/2460/jpeg/23t.jpg) Flowers of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
![](../../pictures/archives/compress/2024/3480/jpeg/07t.jpg) Flower buds of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
![](../../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/2024/3480/jpeg/09t.jpg) Shoot of squaw-weed (Senecio ampullaceus) with flower buds in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
![](../../pictures/archives/compress/2023/3358/jpeg/30t.jpg) Spores an conidia(?) (in KOH) of sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?), collected from white powdery stuff with web from underside leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos a day before. Texas, March 7, 2023
![](../../pictures/archives/compress/2023/3358/jpeg/32t.jpg) Tissues (in Melzer) of sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?), collected from white powdery stuff with web from underside leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos a day before. Texas, March 7, 2023
![](../../pictures/archives/compress/2020/2665/jpeg/22t.jpg) Basal rosette of leaves of some dandelion-like(?) plant on Raccoon Run Trail in Lick Creek Park. College Station, Texas, March 15, 2020
![](../../pictures/archives/compress/2009/735/jpeg/07t.jpg) Cutleaf groundsel (butterweed, squaw weed, Senecio) in Lick Creek Park. College Station, Texas, April 16, 2009
![](../../pictures/archives/compress/2023/3354/jpeg/24t.jpg) Leaf of squaw-weed (Senecio ampullaceus) with sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023
![](../../pictures/archives/compress/2023/3355/jpeg/30t.jpg) Spores (in KOH) of white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) from a leaf of squaw-weed (Senecio ampullaceus), collected near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023
![](../../pictures/archives/compress/2023/3354/jpeg/25t.jpg) Underside of a leaf of squaw-weed (Senecio ampullaceus) with sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023
![](../../pictures/archives/compress/2023/3358/jpeg/31t.jpg) Spores (in Melzer) of sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) together with conidia of Alternaria leaf spot(?), collected from white powdery stuff with web from underside leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos a day before. Texas, March 7, 2023
![](../../pictures/archives/compress/2023/3350/jpeg/11t.jpg) Shoot of squaw-weed (Senecio ampullaceus) at Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, February 26, 2023
![](../../pictures/archives/compress/2022/3124/jpeg/14t.jpg) Flower buds of squaw-weed (Senecio ampullaceus) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, April 3, 2022
![](../../pictures/archives/compress/2009/739/jpeg/20t.jpg) Flower buds of Cutleaf groundsel (butterweed, squaw weed, Senecio) on Deer Run Trail in Lick Creek Park. College Station, Texas, April 29, 2009
![](../../pictures/archives/compress/2008/627/jpeg/25t.jpg) Squaw-weed flower (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 5, 2008
![](../../pictures/archives/compress/2023/3356/jpeg/22t.jpg) Squaw-weed (Senecio ampullaceus) with sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
![](../../pictures/archives/compress/2022/3117/jpeg/25t.jpg) Winter rosette of basal leaves of plantain (Plantago) in Lick Creek Park. College Station, Texas, March 14, 2022
![](../../pictures/archives/compress/2009/718/jpeg/25t.jpg) Opening flowers of Squaw-weed (Senecio) taken from a lawn outside of apartments on George Bush Drive. College Station, Texas, March 13, 2009
![](../../pictures/archives/compress/2023/3356/jpeg/23t.jpg) Underside of a leaf of squaw-weed (Senecio ampullaceus) with sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
![](../../pictures/archives/compress/2020/2665/jpeg/21t.jpg) Carolina ponysfoot (Dichondra carolinensis) on a recent cutting in Lick Creek Park. College Station, Texas, March 15, 2020
![](../../pictures/archives/compress/2009/718/jpeg/24t.jpg) Close-up of Squaw-weed (Senecio) flower buds taken from a lawn outside of apartments on George Bush Drive. College Station, Texas, March 13, 2009
![](../../pictures/archives/compress/2009/718/jpeg/26t.jpg) Close-up of opening flowers of Squaw-weed (Senecio) taken from a lawn outside of apartments on George Bush Drive. College Station, Texas, March 13, 2009
![](../../pictures/archives/compress/2020/2665/jpeg/17t.jpg) Tiger sawgill mushrooms (Lentinus tigrinus) on a recent cutting in Lick Creek Park. College Station, Texas, March 15, 2020
![](../../pictures/archives/compress/2020/2665/jpeg/20t.jpg) Carolina ponysfoot (Dichondra carolinensis) with green flowers on a recent cutting in Lick Creek Park. College Station, Texas, March 15, 2020
![](../../pictures/archives/compress/2020/2665/jpeg/18t.jpg) Mature caps of tiger sawgill mushrooms (Lentinus tigrinus) on a recent cutting in Lick Creek Park. College Station, Texas, March 15, 2020
![](../../pictures/archives/compress/2020/2665/jpeg/15t.jpg) Texas balloonwort (Sphaerocarpos texanus) on a recent cutting in Lick Creek Park. College Station, Texas, March 15, 2020
![](../../pictures/archives/compress/2023/3351/jpeg/09t.jpg) Basal rosette of leaves in Lick Creek Park. College Station, Texas, February 27, 2023
![](../../pictures/archives/compress/2020/2665/jpeg/16t.jpg) Texas balloonwort (Sphaerocarpos texanus) on exposed soil of a recent cutting in Lick Creek Park. College Station, Texas, March 15, 2020
![](../../pictures/archives/compress/2018/2325/jpeg/23t.jpg) Small leaves of Carolina ponysfoot (Dichondra carolinensis) on a recent cutting in Lick Creek Park. College Station, Texas, August 7, 2018
![](../../pictures/archives/compress/2018/2291/jpeg/13t.jpg) Some small Agaricomycetes mushrooms growing on rotting oak leaves on a recent cutting in Lick Creek Park. College Station, Texas, June 21, 2018
![](../../pictures/archives/compress/2018/2291/jpeg/14t.jpg) Close up of some small Agaricomycetes mushrooms growing on rotting oak leaves on a recent cutting in Lick Creek Park. College Station, Texas, June 21, 2018
![](../../pictures/archives/compress/2020/2707/jpeg/07t.jpg) Spotted beebalm (Monarda punctata) on a recent pipeline cutting in Lick Creek Park. College Station, Texas, May 15, 2020
![](../../pictures/archives/compress/2018/2291/jpeg/15t.jpg) Cross section of some small Agaricomycetes mushrooms growing on rotting oak leaves on a recent cutting in Lick Creek Park. College Station, Texas, June 21, 2018
![](../../pictures/archives/compress/2021/2862/jpeg/28t.jpg) Winter rosette of basal leaves of white avens (Geum canadense) in Lick Creek Park. College Station, Texas, February 1, 2021
![](../../pictures/archives/compress/2020/2828/jpeg/17t.jpg) Large green winter basal rosette of thistle in Lick Creek Park. College Station, Texas, December 11, 2020
![](../../pictures/archives/compress/2019/2473/jpeg/05t.jpg) Cursed buttercup (Ranunculus sceleratus) on a recent pipeline cutting in Lick Creek Park. College Station, Texas, March 26, 2019
![](../../pictures/archives/compress/2020/2629/jpeg/04t.jpg) Brittlestem mushrooms Psathyrella umbonata on disturbed soil of a recent sewage cutting in Lick Creek Park. College Station, Texas, January 15, 2020
![](../../pictures/archives/compress/2024/3642/jpeg/17t.jpg) Rosette of basal leaves of bull thistle (Cirsium horridulum) in ultraviolet light on a sewage line right of way in Lick Creek Park. College Station, Texas, November 15, 2024
![](../../pictures/archives/compress/2020/2707/jpeg/01t.jpg) Flower bud of basket flower (Centaurea americana) on a recent pipeline cutting in Lick Creek Park. College Station, Texas, May 15, 2020
![](../../pictures/archives/compress/2024/3472/jpeg/26t.jpg) Winter rosette of narrow basal leaves of plantain (Plantago) on a lawn on Lick Creek Greenway Trail. College Station, Texas, February 16, 2024
![](../../pictures/archives/compress/2010/846/jpeg/13t.jpg) Groundsel (butterweed, squaw weed, Senecio) with spider web in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 26, 2010.
![](../../pictures/archives/compress/2009/719/jpeg/21t.jpg) Cutleaf groundsel (butterweed, squaw weed, Senecio) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 15, 2009
![](../../pictures/archives/compress/2020/2654/jpeg/20t.jpg) Basal rosette with red leaves of stork s bill (bull filaree, Erodium texanum) in Old Baylor Park. Independence, Texas, March 2, 2020
![](../../pictures/archives/compress/2024/3473/jpeg/15t.jpg) Winter rosette of basal leaves of redseed plantain (Plantago rhodosperma) on a lawn on Lick Creek Greenway Trail. College Station, Texas, February 16, 2024
![](../../pictures/archives/compress/2021/2888/jpeg/24t.jpg) Opening flowers of groundsel (butterweed, squaw weed, Senecio) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
![](../../pictures/archives/compress/2021/2888/jpeg/12t.jpg) Flower buds of groundsel (butterweed, squaw weed, Senecio) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
![](../../pictures/archives/compress/2024/3642/jpeg/21t.jpg) Smaller rosette of basal leaves of bull thistle (Cirsium horridulum) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight on a sewage line right of way in Lick Creek Park. College Station, Texas, November 15, 2024
![](../../pictures/archives/compress/2024/3642/jpeg/19t.jpg) Central area of rosette of basal leaves of bull thistle (Cirsium horridulum) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight on a sewage line right of way in Lick Creek Park. College Station, Texas, November 15, 2024
![](../../pictures/archives/compress/2022/3117/jpeg/24t.jpg) Basal leaves of plantain (Plantago) in Lick Creek Park. College Station, Texas, March 14, 2022
![](../../pictures/archives/compress/2019/2549/jpeg/24t.jpg) Shoot of oak on a recent cutting in Lick Creek Park. College Station, Texas, July 7, 2019
![](../../pictures/archives/compress/2018/2401/jpeg/14t.jpg) Recent sewage line cutting in Lick Creek Park. College Station, Texas, November 19, 2018
![](../../pictures/archives/compress/2021/2899/jpeg/24t.jpg) Blooming squaw-weed (Senecio) on Lake Somerville Trailway near Nails Creek Unit of Somerville Lake State Park. Texas, April 4, 2021
![](../../pictures/archives/compress/2020/2741/jpeg/21t.jpg) Fresh leaves of sumpweed (Iva annua) on a recent sewage line right of way in Lick Creek Park. College Station, Texas, July 22, 2020
![](../../pictures/archives/compress/2018/2291/jpeg/12t.jpg) Brittlestem mushrooms Psathyrella umbonata on a recent cutting in Lick Creek Park. College Station, Texas, June 21, 2018
![](../../pictures/archives/compress/2018/2271/jpeg/19t.jpg) Evening primrose (Oenothera) on Butterfly Alley (a recent cutting) in Lick Creek Park. College Station, Texas, May 28, 2018
![](../../pictures/archives/compress/2018/2316/jpeg/13t.jpg) Puffball (Lycoperdon) mushroom on a recent forest cutting in Lick Creek Park. College Station, Texas, July 16, 2018
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