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Tribulus

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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
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, July 27, 2013
Fruit of Tribulus macropterus taken from a roadside of Dukhan Highway in Ash-Shahaniyah. Qatar, December 4, 2015
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
Flower of puncturevine (Caltrop, Tribulus terrestris, Tribulus lanuginosus, local name hasak) on a roadside in southern Qatar, February 11, 2014
Puncturevine (Caltrop, Tribulus terrestris) with a yellow flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 1, 2012
Blooming puncturevine (Caltrop, Tribulus terrestris, Tribulus lanuginosus, local name hasak) on a 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) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 1, 2012
Puncturevine (Caltrop, Tribulus terrestris, Tribulus lanuginosus, local name hasak) in sand on roadside in southern Qatar, February 11, 2014
Small yellow flower of puncturevine (Caltrop, Tribulus terrestris) in Old Baylor Park. Independence, Texas, September 6, 2009
Puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 7, 2010
Puncturevine (caltrop, Tribulus terrestris) on a sidewalk of Al Diwan Street. Doha, Qatar, March 28, 2014
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
Tribulus pentandrus with a flower taken from Abu Nahlah Road, south from Doha. Qatar, March 5, 2014
Caltrop flower (puncturevine, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
Tribulus pentandrus near Abu Nahlah Road, south from Doha. Qatar, March 5, 2014
Tribulus pentandrus with fruits taken from Abu Nahlah Road, south from Doha. Qatar, March 5, 2014
Puncturevine (Caltrop, Tribulus terrestris) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
Puncturevine (Caltrop, Tribulus terrestris) on Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 28, 2014
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 Tribulus pentandrus(?) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
Puncturevine (Caltrop, Tribulus terrestris, local name hasak) taken from Al Luqta area. Doha, Qatar, March 13, 2015
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
Yellow flower of Tribulus macropterus on roadside of Dukhan Highway. Ash-Shahaniyah, Qatar, December 4, 2015
Shoot of Tribulus macropterus with a flower and fruits taken from a roadside of Dukhan Highway in Ash-Shahaniyah. Qatar, December 4, 2015
Seedling of Tribulus macropterus var. arabicus on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, January 22, 2016
Young plant of Tribulus macropterus var. arabicus on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, January 22, 2016
Seedling of Tribulus macropterus var. arabicus emerging from sand in dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, January 22, 2016
Seedling of Tribulus macropterus var. arabicus in sand near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, January 22, 2016
Flower of Tribulus macropterus var. arabicus in sand near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, January 22, 2016
Large yellow flower of Tribulus macropterus var. arabicus in sand near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, January 22, 2016
Blooming Tribulus macropterus var. arabicus in sand near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, January 22, 2016
Tribulus macropterus var. arabicus on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, February 26, 2016
Blooming Tribulus macropterus var. arabicus on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, February 26, 2016
Tribulus macropterus var. arabicus with a flower on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, February 26, 2016
Tribulus macropterus var. arabicus with a large flower on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, February 26, 2016
Tribulus macropterus var. arabicus with a yellow flower on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, February 26, 2016
Large flower of Tribulus macropterus var. arabicus on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, February 26, 2016
Large yellow flower of Tribulus macropterus var. arabicus on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, February 26, 2016
Blooming shoot of Tribulus macropterus var. arabicus on sand near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, February 26, 2016
Yellow flower of Tribulus macropterus var. arabicus on sand near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, February 26, 2016
Tribulus macropterus var. arabicus in bloom on sand near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, February 26, 2016
Tribulus macropterus var. arabicus on windblown sand at the foot of limestone cliffs in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
Blooming plant of Tribulus macropterus var. arabicus on windblown sand at the foot of limestone cliffs in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
Blooming plant of Tribulus macropterus var. arabicus on sand dunes in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
Fruit of Tribulus pentandrus(?) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
Blooming Tribulus pentandrus(?) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
Mat of Tribulus pentandrus(?) on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. Qatar, August 21, 2015
Tribulus macropterus on roadside of Dukhan Highway. Ash-Shahaniyah, Qatar, December 4, 2015
Hairy fruit of Tribulus macropterus taken from a roadside of Dukhan Highway in Ash-Shahaniyah. Qatar, December 4, 2015
Tribulus macropterus with fruits taken from a roadside of Dukhan Highway in Ash-Shahaniyah. Qatar, December 4, 2015
Close up of a hairy fruit of Tribulus macropterus taken from a roadside of Dukhan Highway in Ash-Shahaniyah. Qatar, December 4, 2015
Close up of Tribulus macropterus with fruits taken from a roadside of Dukhan Highway in Ash-Shahaniyah. Qatar, December 4, 2015
Fruits of Tribulus macropterus detached from the plant taken from a roadside of Dukhan Highway in Ash-Shahaniyah. Qatar, December 4, 2015
Fruits of Tribulus macropterus(?) taken from a roadside of roadside of Salwa Road near Abu Nakhlah. Qatar, December 11, 2015
Tribulus macropterus var. arabicus on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, March 4, 2016
Fruits of Tribulus macropterus var. arabicus growing on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, March 4, 2016
Blooming Tribulus macropterus var. arabicus on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, March 4, 2016
Tribulus macropterus var. arabicus with flowers on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, March 4, 2016
Tribulus macropterus var. arabicus with yellow flowers on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, March 4, 2016
Blooming branch of Tribulus macropterus var. arabicus on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, March 4, 2016
Tribulus macropterus var. arabicus in flower on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, March 4, 2016
Tribulus macropterus var. arabicus on sand in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, March 25, 2016
Blooming plant of Tribulus macropterus var. arabicus on sand in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, March 25, 2016
Branch of Tribulus macropterus var. arabicus on sand in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
Blooming plant of Tribulus macropterus var. arabicus on windblown sand at the foot of limestone cliffs in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
Blooming plant of Tribulus macropterus var. arabicus in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
Tribulus macropterus var. arabicus in sandy area below a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
Blooming Tribulus macropterus var. arabicus in sandy area below a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
Yellow flowers of Tribulus macropterus var. arabicus in sandy area in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
Yellow flower of Tribulus macropterus var. arabicus in sandy area in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
Tribulus macropterus var. arabicus on a hill slope in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
Blooming Tribulus macropterus var. arabicus in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
Tribulus macropterus var. arabicus in sandy area in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 29, 2016
Blooming plant of Tribulus macropterus var. arabicus in sandy area in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 29, 2016
Tribulus macropterus var. arabicus with flowers in sandy area in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 29, 2016
Tribulus macropterus var. arabicus with flowers in windblown sand in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 29, 2016
Solitary plant of Tribulus macropterus var. arabicus in windblown sand in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 29, 2016
Solitary plant of Tribulus macropterus var. arabicus with flowers in windblown sand in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 29, 2016
Solitary blooming plant of Tribulus macropterus var. arabicus in windblown sand in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 29, 2016
Tribulus macropterus var. arabicus on a slope of a limestone hill in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 29, 2016

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