![](../../pictures/archives/compress/2019/2558/jpeg/19t.jpg) Puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 10, 2019
![](../../pictures/archives/compress/2012/1102/jpeg/01t.jpg) Caltrop flower (puncturevine, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
![](../../pictures/archives/compress/2013/1233/jpeg/08t.jpg) Puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 27, 2013
![](../../pictures/archives/compress/2010/886/jpeg/22t.jpg) Puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 7, 2010
![](../../pictures/archives/compress/2012/1075/jpeg/08t.jpg) Puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 1, 2012
![](../../pictures/archives/compress/2010/888/jpeg/23t.jpg) Flower of puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 29, 2010
![](../../pictures/archives/compress/2012/1075/jpeg/09t.jpg) Puncturevine (Caltrop, Tribulus terrestris) with a yellow flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 1, 2012
![](../../pictures/archives/compress/2014/1446/jpeg/15t.jpg) Puncturevine (Caltrop, Tribulus terrestris) on Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 28, 2014
![](../../pictures/archives/compress/2014/1341/jpeg/22t.jpg) Puncturevine (Caltrop, Tribulus terrestris, Tribulus lanuginosus, local name hasak) in sand on roadside in southern Qatar, February 11, 2014
![](../../pictures/archives/compress/2014/1342/jpeg/03t.jpg) Flower of puncturevine (Caltrop, Tribulus terrestris, Tribulus lanuginosus, local name hasak) on a roadside in southern Qatar, February 11, 2014
![](../../pictures/archives/compress/2014/1342/jpeg/05t.jpg) Blooming puncturevine (Caltrop, Tribulus terrestris, Tribulus lanuginosus, local name hasak) on a roadside in southern Qatar, February 11, 2014
![](../../pictures/archives/compress/2014/1342/jpeg/04t.jpg) Yellow flowers of puncturevine (Caltrop, Tribulus terrestris, Tribulus lanuginosus, local name hasak) on a roadside in southern Qatar, February 11, 2014
![](../../pictures/archives/compress/2014/1341/jpeg/26t.jpg) 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
![](../../pictures/archives/compress/2009/791/jpeg/02t.jpg) Small yellow flower of puncturevine (Caltrop, Tribulus terrestris) in Old Baylor Park. Independence, Texas, September 6, 2009
![](../../pictures/archives/compress/2014/1383/jpeg/01t.jpg) Puncturevine (caltrop, Tribulus terrestris) on a sidewalk of Al Diwan Street. Doha, Qatar, March 28, 2014
![](../../pictures/archives/compress/2015/1557/jpeg/23t.jpg) Puncturevine (Caltrop, Tribulus terrestris, local name hasak) taken from Al Luqta area. Doha, Qatar, March 13, 2015
![](../../pictures/archives/compress/2014/1397/jpeg/02t.jpg) Puncturevine (Caltrop, Tribulus terrestris) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
![](../../pictures/archives/compress/2015/1679/jpeg/12t.jpg) 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
![](../../pictures/archives/compress/2014/1469/jpeg/14t.jpg) Puncturevine (Caltrop, Tribulus terrestris) on a path in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, August 1, 2014
![](../../pictures/archives/compress/2014/1469/jpeg/13t.jpg) 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
![](../../pictures/archives/compress/2014/1469/jpeg/22t.jpg) 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
![](../../pictures/archives/compress/2019/2565/jpeg/06t.jpg) Dayflower (Commelina) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/18t.jpg) Leaves of Mimosa strigillosa in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/20t.jpg) Beeblossom flowers (Gaura) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/09t.jpg) Blooming dayflower (Commelina) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/18t.jpg) Coastal sandbur (Cenchrus spinifex) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/11t.jpg) Morning Glory (Ipomoea cordatotriloba) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/05t.jpg) Fragrant flatsedge (Cyperus odoratus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 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/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/02t.jpg) Giant ragweed (Ambrosia trifida) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/13t.jpg) Zizotes milkweed (Asclepias oenotheroides) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/17t.jpg) Plants of snow-on-the-prairie (Euphorbia bicolor) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/19t.jpg) Grasshopper on snow-on-the-prairie (Euphorbia bicolor) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/13t.jpg) Flowers of Morning Glory (Ipomoea cordatotriloba) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/15t.jpg) Field of snow-on-the-prairie (Euphorbia bicolor) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/16t.jpg) Flowers of snow-on-the-prairie (Euphorbia bicolor) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/03t.jpg) Coffeeweed (Sesbania herbacea) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/14t.jpg) Flowers of Zizotes milkweed (Asclepias oenotheroides) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/19t.jpg) Pink flowers of creeping beggarweed (Desmodium incanum) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/21t.jpg) Hydnoid (tooth) resupinate mushroom Mycoaciella bispora on an oak log in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/20t.jpg) Resette of leaves and small white flowers of a plant in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/21t.jpg) Blooming plants of snow-on-the-prairie (Euphorbia bicolor) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/01t.jpg) Climbing hempvine (Mikania scandens) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/14t.jpg) Back lit flower of Morning Glory (Ipomoea cordatotriloba) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/12t.jpg) Purple gerardia (false foxglove, Agalinis purpurea) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/08t.jpg) Morning Glory (Purple Bindweed, Ipomoea cordatotriloba) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/16t.jpg) Blooming purple gerardia (false foxglove, Agalinis purpurea) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/15t.jpg) Flower of purple gerardia (false foxglove, Agalinis purpurea) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/10t.jpg) Blooming morning glory (Purple Bindweed, Ipomoea cordatotriloba) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/23t.jpg) Close up of hydnoid (tooth) resupinate mushroom Mycoaciella bispora on rotting oak in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/22t.jpg) Hydnoid (tooth) resupinate mushroom Mycoaciella bispora on rotting wood in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/17t.jpg) 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
![](../../pictures/archives/compress/2019/2565/jpeg/11t.jpg) Flower of morning glory (Purple Bindweed, Ipomoea cordatotriloba) on Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2565/jpeg/04t.jpg) Flowers and fruits of coffeeweed (bigpod sesbania, Sesbania herbacea) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/23t.jpg) Staminate flowers of creeping lovegrass (Eragrostis reptans, Neeragrostis reptans) in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2562/jpeg/22t.jpg) Creeping lovegrass (Eragrostis reptans, Neeragrostis reptans) with male flowers in a dried pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2019
![](../../pictures/archives/compress/2019/2444/jpeg/19t.jpg) Blooming phlox in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 2, 2019
![](../../pictures/archives/compress/2019/2469/jpeg/11t.jpg) Bluebonnet (Lupinus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
![](../../pictures/archives/compress/2019/2460/jpeg/24t.jpg) Flower of dewberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
![](../../pictures/archives/compress/2019/2610/jpeg/14t.jpg) Mistletoe berries in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 8, 2019
![](../../pictures/archives/compress/2019/2556/jpeg/09t.jpg) Sunflower (Helianthus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 27, 2019
![](../../pictures/archives/compress/2019/2444/jpeg/14t.jpg) Pink phlox in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 2, 2019
![](../../pictures/archives/compress/2019/2460/jpeg/21t.jpg) Shoot of cedar elm in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
![](../../pictures/archives/compress/2019/2474/jpeg/15t.jpg) Red phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 27, 2019
![](../../pictures/archives/compress/2019/2454/jpeg/09t.jpg) Catkins on a large oak in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 27, 2019
![](../../pictures/archives/compress/2019/2469/jpeg/12t.jpg) Spiderwort (Tradescantia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
![](../../pictures/archives/compress/2019/2454/jpeg/06t.jpg) Large oak with catkins in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 27, 2019
![](../../pictures/archives/compress/2019/2460/jpeg/20t.jpg) Spiderwort (Tradescantia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
![](../../pictures/archives/compress/2019/2454/jpeg/04t.jpg) Phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 27, 2019
![](../../pictures/archives/compress/2019/2454/jpeg/07t.jpg) Huisache (Acacia) trees in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 27, 2019
![](../../pictures/archives/compress/2019/2474/jpeg/12t.jpg) Pink spiderwort (Tradescantia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 27, 2019
![](../../pictures/archives/compress/2019/2454/jpeg/11t.jpg) View of FM 1155 road from Washington-on-the-Brazos State Historic Site. Washington, Texas, February 27, 2019
![](../../pictures/archives/compress/2019/2610/jpeg/30t.jpg) Rosy corticioid fungus on an oak log in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 8, 2019
![](../../pictures/archives/compress/2019/2474/jpeg/22t.jpg) Pink phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 27, 2019
![](../../pictures/archives/compress/2019/2530/jpeg/11t.jpg) Close up of masses of millipedes in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 16, 2019
![](../../pictures/archives/compress/2019/2530/jpeg/13t.jpg) Beebalm (Monarda punctata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 16, 2019
![](../../pictures/archives/compress/2019/2556/jpeg/10t.jpg) Petals of sunflower (Helianthus) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 27, 2019
![](../../pictures/archives/compress/2019/2433/jpeg/21t.jpg) Dirinaria lichen with apothecia in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
![](../../pictures/archives/compress/2019/2469/jpeg/17t.jpg) Buttercup (Ranunculus) near a former pond in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
![](../../pictures/archives/compress/2019/2444/jpeg/15t.jpg) Spiderwort (tradescantia) on a meadow in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 2, 2019
![](../../pictures/archives/compress/2019/2460/jpeg/22t.jpg) Back lit shoot of cedar elm in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 9, 2019
![](../../pictures/archives/compress/2019/2572/jpeg/13t.jpg) Accumulation of elm catkins near ant burrows in Washington-on-the-Brazos State Historic Site. Washington, Texas, October 5, 2019
![](../../pictures/archives/compress/2019/2444/jpeg/13t.jpg) Winter rosette of a plant in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 2, 2019
![](../../pictures/archives/compress/2019/2469/jpeg/10t.jpg) Pink phlox flowers in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
![](../../pictures/archives/compress/2019/2433/jpeg/23t.jpg) Dirinaria(?) lichen on hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
![](../../pictures/archives/compress/2019/2433/jpeg/22t.jpg) Small Dirinaria lichen in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
![](../../pictures/archives/compress/2019/2620/jpeg/08t.jpg) Winter rosette of a thistle in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 28, 2019
![](../../pictures/archives/compress/2019/2454/jpeg/14t.jpg) Blue spiderwort (Tradescantia) in Washington-on-the-Brazos State Historic Site. Washington, Texas, February 27, 2019
![](../../pictures/archives/compress/2019/2469/jpeg/26t.jpg) Pink flowers of phlox in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
![](../../pictures/archives/compress/2019/2430/jpeg/06t.jpg) Ruffle lichen Parmotrema submarginale on an oak in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 12, 2019
![](../../pictures/archives/compress/2019/2433/jpeg/07t.jpg) Fringe lichen (Heterodermia) on hackberry in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
![](../../pictures/archives/compress/2019/2530/jpeg/08t.jpg) Millipede with some yellow fungus on a rotting log in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 16, 2019
![](../../pictures/archives/compress/2019/2460/jpeg/17t.jpg) Gills of a mushroom Amanita morrisii in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 8, 2019
![](../../pictures/archives/compress/2019/2549/jpeg/08t.jpg) Milkcap mushrooms Lactarius subserifluus in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 6, 2019
![](../../pictures/archives/compress/2019/2530/jpeg/15t.jpg) Blooming beebalm (Monarda punctata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 16, 2019
![](../../pictures/archives/compress/2019/2469/jpeg/07t.jpg) Shoot of hackberry (Celtis laevigata) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
![](../../pictures/archives/compress/2019/2469/jpeg/08t.jpg) Mustang grape (Vitis mustangensis) in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 17, 2019
![](../../pictures/archives/compress/2019/2433/jpeg/25t.jpg) Lichen Lecanora louisianae(?) on bark in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
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