Puncturevine (Caltrop, Tribulus terrestris) with a yellow flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 1, 2012
Puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 1, 2012
Flower of puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 29, 2010
Puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
Puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 10, 2019
Puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 27, 2013
Puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 7, 2010
Puncturevine (Caltrop, Tribulus terrestris) on Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 28, 2014
Flower of puncturevine (Caltrop, Tribulus terrestris, Tribulus lanuginosus, local name hasak) on a roadside in southern Qatar, February 11, 2014
Small yellow flower of puncturevine (Caltrop, Tribulus terrestris) in Old Baylor Park. Independence, Texas, September 6, 2009
Flower of puncturevine (Caltrop, Tribulus terrestris, Tribulus lanuginosus, local name hasak) in sand near a road to Saudi Arabia in southern Qatar, February 11, 2014
Blooming puncturevine (Caltrop, Tribulus terrestris, Tribulus lanuginosus, local name hasak) on a roadside in southern Qatar, February 11, 2014
Puncturevine (Caltrop, Tribulus terrestris, Tribulus lanuginosus, local name hasak) in sand on roadside in southern Qatar, February 11, 2014
Yellow flowers of puncturevine (Caltrop, Tribulus terrestris, Tribulus lanuginosus, local name hasak) on a roadside in southern Qatar, February 11, 2014
Puncturevine (caltrop, Tribulus terrestris) on a sidewalk of Al Diwan Street. Doha, Qatar, March 28, 2014
Puncturevine (Caltrop, Tribulus terrestris, local name hasak) taken from Al Luqta area. Doha, Qatar, March 13, 2015
Puncturevine (Caltrop, Tribulus terrestris) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
Puncturevine (Caltrop, Tribulus terrestris) in a silty depression on roadside of a road to Zubara, area of Al Magdah farms. Northern Qatar, October 24, 2015
Puncturevine (Caltrop, Tribulus terrestris) on a path in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, August 1, 2014
Back lit flower of buttercup in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 27, 2012
Close up of Puncturevine (Caltrop, Tribulus terrestris) on a path in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, August 1, 2014
Fruit of Puncturevine (Caltrop, Tribulus terrestris) on a path in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, August 1, 2014
White gaura flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 20, 2012
Opening thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
Mexican hat flower (Ratibida columnifera) in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
Mexican hat flower (Ratibida columnifera) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
Flower of common sunflower (Helianthus annuus) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 19, 2012
Yellow flower of Engelmann s daisy (Engelmannia peristenia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
Petals of Indian blanket (Gaillardia pulchella, firewheel) flower in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 19, 2012
A road in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 23, 2012
Spider web in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 23, 2012
Flower buds of green milkweed (Antelope horns, asclepias viridis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 1, 2012
Foggy sunrise over a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 23, 2012
Orange butterfly near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Some blooming plant near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Turnsole (Heliotropium indicum) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Snow-on-the-prairie (Euphorbia bicolor) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 23, 2012
Scarlet spiderling (Boerhavia diffusa) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 23, 2012
Powderpuff (Mimosa strigillosa) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
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 Small White Morning Glory (Whitestar, Pitted Morningglory, Ipomoea lacunosa) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 25, 2012
Horse apple (osage orange) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Yerba de Tajo (Eclipta prostrata) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Blooming giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Balloon Vine (Cardiospermum halicacabum) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 23, 2012
Back lit flower of Morning Glory (Ipomoea cordatotriloba) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
Tiny yellow flower of Melonette (Melothria pendula) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 21, 2008
Flower buds of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
Close up of horse apple (osage orange) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Flowers of balloon vine (Cardiospermum halicacabum) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Flower spike of giant reed (Arundo donax) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 27, 2020
Flower of purple gerardia (false foxglove, Agalinis purpurea) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2020
Flower of purple gerardia (false foxglove, Agalinis purpurea) with dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2010
Flower of purple gerardia (false foxglove, Agalinis purpurea) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
Green flowers with pollen of giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Back lit flowers of balloon vine (Cardiospermum halicacabum) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Damselfly on a flower of purple gerardia (false foxglove, Agalinis purpurea) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2010
Opening flower of purple gerardia (false foxglove, Agalinis purpurea) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2010
Close up of a flower of purple gerardia (false foxglove, Agalinis purpurea) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
Flower of morning glory (Purple Bindweed, Ipomoea cordatotriloba) on Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
Brazos River from Robinson s Ferry Overlook in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 8, 2012
Nodding flower spike of Lizard-tail gaura (downy gaura, Gaura parviflora, G. mollis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 23, 2012
Creeping lovegrass (Eragrostis reptans, Neeragrostis reptans) near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Lizard-tail gaura (downy gaura, Gaura parviflora, G. mollis) spike flower with stilt bugs (Jalysus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 1, 2012
Magnolia flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
Thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 17, 2014
Flower of thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
Pond with fog in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 27, 2012
Brown butterfly in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 19, 2012
Lichens in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
Cardinal butterfly in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 19, 2012
Orange butterfly in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 27, 2012
Buckeye butterfly in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 27, 2012
Pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 25, 2012
Striped caterpillar in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 4, 2012
Multicolored flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 4, 2012
Coreopsis near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 19, 2012
Spider web in fog in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2012
Poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 23, 2012
Thistle flower (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 5, 2022
Prairie parsley flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2008
Verbena (vervain) flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 31, 2008
Thistle flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 27, 2008
Flower of dewberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
Dry flower spike of plantain in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 24, 2009
Herbertia flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 12, 2018
Flower of a thustle (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 24, 2020
Winecup flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, April 13, 2008
Bluebonnet flower in dew in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2008
White magnolia flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
Thistle flower (Cirsium) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 3, 2009
Paintbrush flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2008
A field near Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 8, 2012
Blue dragonfly near a pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 19, 2012
Back lit leaf of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 27, 2012
Dry sumpweed (Iva annua) in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 17, 2012
Mistletoe on a tree in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 8, 2012
Pond with mist in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 3, 2012
Independence Hall in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 8, 2012
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