 Flower of 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
 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
 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
 Puncturevine (caltrop, Tribulus terrestris) on a sidewalk of Al Diwan Street. Doha, Qatar, March 28, 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, local name hasak) taken from Al Luqta area. Doha, Qatar, March 13, 2015
 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
 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
 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
 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) 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, 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, September 1, 2019
 Flower of puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 29, 2010
 Caltrop flower (puncturevine, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 1, 2012
 Puncturevine (Caltrop, Tribulus terrestris) with a yellow flower in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 1, 2012
 Pulicaria undulata on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Peeling dried clay on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Flowers of Picris cyanocarpa on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Pulicaria undulata with flowers on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Vegetation in a depression on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Blooming Pulicaria undulata on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Blooming Cornulaca monacantha(?) on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Taking pictures of plants on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Aerva javanica with woolly flowers on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Suaeda aegyptiaca(?) with seeds on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Bushy bindweed (Convolvulus prostratus) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Desert plant Picris cyanocarpa(?) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Blooming Ribwort Plantain (Plantago lanceolata) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Ribwort Plantain (Plantago lanceolata) in sand on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Floccise woolly flowers of Aerva javanica on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Seeds of Argentine peppercress (Lepidium bonariense) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Yellow flowers of Acacia ehrenbergiana on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Small white flowers of Acacia tortilis(?) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Dry seeds of Zilla spinosa on the ground on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Argentine peppercress (Lepidium bonariense) with seeds on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Flower spike of Ribwort Plantain (Plantago lanceolata) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Bushy bindweed (Convolvulus prostratus) with white flowers on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Fruits of Zilla spinosa carpeting the ground on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Accumulation of sand around desert plants of Pulicaria and Zygophyllum on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Round dry seed capsules (fruits) of flax (Linum usitatissimum) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Oval seed pods of chickpea (Cicer arietinum) on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Centaurea sinaica (local names birkan, murrar) with seeds on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Almost dry Centaurea sinaica (local names birkan, murrar) with seeds on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Aerva javanica (local names towayim, tarfa, tirf, Tuwaim) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Virgin s Hand (Anastatica hierochuntica, local names kaf mariam, jefaiea) in sand on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Blooming Virgin s Hand (Anastatica hierochuntica, local names kaf mariam, jefaiea) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Seed pods of milkweed Glossonema varians (local names jarawa, yarawa) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Dry fruits (long-beaked siliqua) of field mustard (Brassica rapa) on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Alfalfa (lucerne, Medicago sativa, local names jet, barseem) in sand on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Centaurea sinaica (local names birkan, murrar) with seeds and flowers on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Desert Shaggy Mane mushrooms (Black Powderpuff, Podaxis pistillaris(?)) in sand on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Desert Shaggy Mane mushroom (Black Powderpuff, Podaxis pistillaris(?)) in sand on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Seeds of Virgin s Hand (Anastatica hierochuntica, local names kaf mariam, jefaiea) in sand on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Fluffy seeds of distaff-thistle (Atractylis carduus, local names jalwa, laymoony, shuwwaykh) on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Fruits of Zygophyllum simplex (Tetraena simplex, harm, hureim) on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Zygophyllum simplex (Tetraena simplex, harm, hureim) forming a sand mound on roadside of Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Large bush of Zilla spinosa (Bunias spinosa, local name shabram) on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Blooming Centaurea sinaica (Centaurea pseudosinaica, Amberboa crupioides, local names birkan, murrar) on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Leaves of desert gourd Citrullus colocynthis (bitter apples, Cucumis colocynthis, local names handal, shary, Handhal) on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Shoot of desert gourd Citrullus colocynthis (bitter apples, Cucumis colocynthis, local names handal, shary, Handhal) on roadside of Salwa Road near Karaana, south-west from Doha. Qatar, April 23, 2014
 Aerva javanica (Aerva persica, Iresine javanica, local names towayim, tarfa, tirf, Tuwaim) in a depression on roadside of Salwa Road near Karaana (Karana, Al Kiranah), south-west from Doha. Qatar, April 23, 2014
 Fruits of Tribulus macropterus(?) taken from a roadside of roadside of Salwa Road near Abu Nakhlah. Qatar, December 11, 2015
 Horsetail knotweed (Polygonum equisetiforme, local name qadab) in a depression near Salwa Road, south-west from Doha. Qatar, April 23, 2014
 Tribulus pentandrus near Abu Nahlah Road, south from Doha. Qatar, March 5, 2014
 Tribulus pentandrus with a flower taken from 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
 Desert date trees (Balanites aegyptiaca) on roadside of Salwa Highway near Saliyah military housing south-west from Doha. Qatar, April 29, 2016
 Pepper-grass (Lepidium aucheri) on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Branches of desert date trees (Balanites aegyptiaca) on roadside of Salwa Highway near Saliyah military housing south-west from Doha. Qatar, April 29, 2016
 Seeds of Argentine peppercress (Lepidium bonariense) on roadside of Salwa Road in south-western Qatar, March 3, 2014
 Saltwort (Salsola vermiculata(?), local name hamd) on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Argentine peppercress (Lepidium bonariense) on roadside depression of Salwa Road in south-western Qatar, March 3, 2014
 Green branches of desert date trees (Balanites aegyptiaca) on roadside of Salwa Highway near Saliyah military housing south-west from Doha. Qatar, April 29, 2016
 Mating pitted darkling beetles (Adesmia cancellata) on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Herniaria hemistemon (local name Ghebayra) with tiny leaves on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Desert species of Morning glory (Convolvulus cephalopodus?) on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Desert heliotrope (turnsole, Heliotropium bacciferum, local name Ramram) on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Dill (Anethum graveolens, local names ein jarada, shabat) on roadside of Salwa Road in south-western Qatar, March 3, 2014
 Flower of a desert species of Morning glory (Convolvulus cephalopodus?) on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Seeds of dill (Anethum graveolens, local names ein jarada, shabat) on roadside of Salwa Road in south-western Qatar, March 3, 2014
 Prickly Dock (Emex spinosa, Rumex spinosus, local names drs al ajooz, hanzab) on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Desert plant purslane-leaved aizoon (Aizoon canariense) on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Blooming Zygophyllum simplex (Tetraena simplex, local names Daa, harm, hureim) on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Desert date (Balanites aegyptiaca) on roadside of Salwa Highway near Saliyah military housing south-west from Doha. Qatar, March 25, 2016
 Blooming desert date (Balanites aegyptiaca) on roadside of Salwa Highway near Saliyah military housing south-west from Doha. Qatar, May 27, 2016
 Flowers of desert date (Balanites aegyptiaca) on roadside of Salwa Highway near Saliyah military housing south-west from Doha. Qatar, May 27, 2016
 Blooming Moltkiopsis ciliata (Lithospermum ciliatum, Lithospermum angustifolium, local names halam, Ghabshah) on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Flowers of Moltkiopsis ciliata (Lithospermum ciliatum, Lithospermum angustifolium, local names halam, Ghabshah) on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Desert plant Moltkiopsis ciliata (Lithospermum ciliatum, Lithospermum angustifolium, local names halam, Ghabshah) on roadside of Salwa Road in south-western Qatar, February 21, 2014
 Shoot of desert date (Balanites aegyptiaca) taken from roadside of Salwa Highway near Saliyah military housing south-west from Doha. Qatar, March 25, 2016
 Foliage of desert date (Balanites aegyptiaca) on roadside of Salwa Highway near Saliyah military housing south-west from Doha. Qatar, March 25, 2016
 Desert date tree (Balanites aegyptiaca) on roadside of Salwa Highway near Saliyah military housing south-west from Doha. Qatar, March 25, 2016
 Desert date (Balanites aegyptiaca) with green flowers on roadside of Salwa Highway near Saliyah military housing south-west from Doha. Qatar, May 27, 2016
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