 Shoot of squaw-weed (Senecio ampullaceus) with flower buds in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Flower buds of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2022
 Squaw-weed flower (Senecio ampullaceus) in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2008
 Squaw-weed flower (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 5, 2008
 Flower buds of groundsel (butterweed, squaw weed, Senecio) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 7, 2024
 Squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Blooming squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2022
 Blooming squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Flowers of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
 Basal rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 20, 2022
 Rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Unfolding leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 Basal rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 8, 2021
 Winter rosette of leaves of squaw-weed (Senecio ampullaceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 24, 2021
 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
 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
 Groundsel (butterweed, squaw weed, Senecio) with spider web in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 26, 2010.
 Cutleaf groundsel (butterweed, squaw weed, Senecio) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 15, 2009
 Opening flowers of groundsel (butterweed, squaw weed, Senecio) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 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
 Flower buds of squaw-weed (Senecio ampullaceus) in Anderson Arboretum in Bee Creek Park. College Station, March 7, 2024
 Flower buds of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023
 Flower buds of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023
 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
 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
 Flower buds of squaw-weed (Senecio ampullaceus) in Lick Creek Park. College Station, Texas, March 20, 2023
 Flower buds of squaw-weed (Senecio ampullaceus) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 18, 2021
 Flower buds of red buckeye (Aesculus pavia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 Squaw-weed flowers in Washington-on-the-Brazos Historic Site. Washington, Texas, March 30, 2008
 Flower buds of squaw-weed (Senecio ampullaceus) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, April 3, 2022
 Squaw-weed flowers (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 29, 2024
 Flower buds of bluebonnet (lupin) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 19, 2010.
 Flower buds of mustang grape in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2021
 Young leaves and flower buds of hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 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
 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
 Flower buds of Engelmann daisy (Engelmannia pinnatifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Flower buds of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Flower buds of woolly-white (Hymenopappus artemisiaefolius) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Young leaves and flower buds of thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2023
 Prickly flower buds of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Prickly flower buds on a shoot of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 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
 White bishops weed-like flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2008
 Salt Marsh Moth caterpillar (Estigmene acrea) on Senecio(?) flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
 Leaves of squaw-weed (Senecio ampullaceus) in Bee Creek Park. College Station, Texas, February 26, 2024
 Flower of bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 26, 2024
 Unfolding flowers of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 5, 2023
 Flower buds of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
 Flower buds of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2023
 Flower buds of Snow-on-the-prairie (Euphorbia bicolor) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 15, 2020
 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
 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
 Prickly flower buds of bull nettle (Cnidoscolus texanus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Prickly peas cactus (Opuntia) with yellow Senecio(?) flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 25, 2018
 Flower buds of green milkweed (Antelope horns, asclepias viridis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 1, 2012
 Gall from underside of a leaf of squaw-weed (Senecio ampullaceus) in Bee Creek Park. College Station, Texas, April 9, 2024
 Flower buds of green milkweed Asclepias viridis on Wildflower Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2021
 Squaw-weed (Senecio ampullaceus) in Lick Creek Park. College Station, Texas, March 20, 2023
 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
 Squaw-weed flowers (Senecio ampullaceus) in Lick Creek Park. College Station, Texas, March 20, 2023
 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
 Flower buds of Texas thistle (Cirsium texanum) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 3, 2021
 Flower buds of red buckeye (Southern buckeye, Aesculus pavia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 27, 2019
 Flower buds of wild lettuce (Florida blue lettuce, Lactuca floridana) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 5, 2022
 Leaves of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 16, 2023
 Leaves of squaw-weed (Senecio ampullaceus) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas, February 15, 2023
 Squaw-weed (Senecio ampullaceus) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 29, 2021
 Basal rosette of leaves of squaw-weed (Senecio ampullaceus) on a recent cutting in Lick Creek Park. College Station, Texas, March 15, 2020
 Winter rosette of squaw-weed (Senecio ampullaceus) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, March 12, 2022
 Cucumber weed (Parietaria pensylvanica) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 11, 2023
 Paintbrush flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2008
 Bluebonnet flower in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2008
 Flower of dewberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
 Buttercup flower near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 8, 2009
 Flower bud of a thistle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 29, 2023
 Paintbrush flower in morning dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2008
 Indian paintbrush flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2008
 Bluebonnet flower in morning dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2008
 Yellow Water-weed (Ludwigia peploides) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 29, 2010
 Flower of mallow family near a museum in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
 Pink flower of spiderwort (Tradescantia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 27, 2019
 Pink spiderwort (tradescantia) flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2009
 Pink flower of spiderwort (Tradescantia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Flower spike of bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Flower buds of Cutleaf groundsel (butterweed, squaw weed, Senecio) on Deer Run Trail in Lick Creek Park. College Station, Texas, April 29, 2009
 Back lit yellow Water-weed (Ludwigia peploides) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 29, 2010
 Yellow Water-weed (Ludwigia peploides) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 29, 2010
 Bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
 White prickly poppy flower on field near Old Washington Town Site Loop Trail of Washington-on-the-Brazos State Historic Site. Washington, Texas, June 2, 2007
 Flower of Venus looking glass (Triodanis perfoliata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 27, 2019
 Hairy stamen filaments of spiderwort flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 28, 2008
 Stamens of a pink spiderwort (tradescantia) flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 21, 2009
 Close-up of a blue flower of spiderwort (Tradescantia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Yellow flower of sow thistle (Sonchus oleraceus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 6, 2022
 Pink phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 1, 2024
|