 Spikelet of southern sandbur grass (Cenchrus echinatus) on Al Muhandiseen Street near West Bay. Doha, Qatar, May 6, 2014
 Southern sandbur grass (Cenchrus echinatus) near Al Istiqlal Street in West Bay. Doha, Qatar, May 5, 2014
 Spike of southern sandbur grass (Cenchrus echinatus) near Al Sham Street in West Bay. Doha, Qatar, May 5, 2014
 Southern sandbur grass (Cenchrus echinatus) taken from Al Sham Street in West Bay. Doha, Qatar, February 19, 2015
 Southern sandbur grass (Cenchrus echinatus) taken from Makkah Street in Al Luqta area. Doha, Qatar, March 15, 2016
 Spikelet of Buffelgrass (African foxtail grass, Cenchrus pennisetiformis) on Al Muhandiseen Street near West Bay. Doha, Qatar, May 6, 2014
 Buffelgrass (African foxtail grass, Cenchrus pennisetiformis) on Al Muhandiseen Street near West Bay. Doha, Qatar, May 6, 2014
 Close up of a soft spike of buffelgrass (African foxtail grass, Cenchrus pennisetiformis) on Al Sham Street in area of West Bay. Doha, Qatar, April 11, 2014
 Spikelet of buffelgrass (African foxtail grass, Cenchrus pennisetiformis) taken from Onaiza area near West Bay. Doha, Qatar, September 9, 2015
 Buffelgrass (African foxtail grass, Cenchrus pennisetiformis) on Al Sham Street in area of West Bay. Doha, Qatar, April 11, 2014
 Soft spike of buffelgrass (African foxtail grass, Cenchrus pennisetiformis) on Al Sham Street in area of West Bay. Doha, Qatar, April 11, 2014
 Common sandbur grass (Cenchrus spinifex) in Old Baylor Park. Independence, Texas, September 3, 2020
 Fruits of date palm (Phoenix dactylifera, local name nakheel) on Al Muhandiseen Street near West Bay. Doha, Qatar, May 6, 2014
 Date palm (Phoenix dactylifera, local name nakheel) with fruits on Al Muhandiseen Street near West Bay. Doha, Qatar, May 6, 2014
 Dry rusty brown leaves and inflorescence of mango tree (Mangifera indica) on the ground near Al Muhandiseen Street in West Bay. Doha, Qatar, May 7, 2014
 Purslane-leaved aizoon (Aizoon canariense) on Al Muhandiseen Street near West Bay. Doha, Qatar, May 6, 2014
 Purslane-leaved aizoon (Aizoon canariense) on sidewalk of Al Muhandiseen Street near West Bay. Doha, Qatar, May 6, 2014
 Purslane-leaved aizoon (Aizoon canariense) plant grown on sidewalk of Al Muhandiseen Street near West Bay. Doha, Qatar, May 6, 2014
 Fagonia bruguieri (Fagonia echinella, local names dereima, showeika, shaki, shoka, Dhuraymah) near Al Muhandiseen Street in West Bay. Doha, Qatar, May 7, 2014
 African foxtail grass (buffelgrass, Cenchrus pennisetiformis)(?) taken from Makkah Street in Al Luqta area. Doha, Qatar, March 15, 2016
 Spikelet of finger grass (Chloris virgata) taken from Al Sham Street in Onaiza area. Doha, Qatar, April 20, 2015
 Buffelgrass (African foxtail grass, Cenchrus pennisetiformis) taken from Onaiza area near West Bay. Doha, Qatar, September 9, 2015
 Grass spikelet of Asian crabgrass (Digitaria bicornis) taken near Al Sham Street in Onaiza area. Doha, Qatar, June 3, 2015
 Spikelet of rabbitsfoot grass (Polypogon monspeliensis)(?) taken from eastern Al Jood Street in Onaiza area. Doha, Qatar, April 7, 2015
 Close up of fruits of Ashwagandha plant (Withania somnifera) taken from Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Sandburs spikelet (Cenchrus spinifex) in Lemontree Park. College Station, Texas, July 27, 2014
 Field sandbur grass (Cenchrus spinifex) on shores of Lake Somerville near Birch Creek Unit of Somerville Lake State Park. Texas, October 4, 2022
 Grass spikelet of Asian crabgrass (Digitaria bicornis) on white background taken near Al Sham Street in Onaiza area. Doha, Qatar, June 3, 2015
 Grass spikelet of Asian crabgrass (Digitaria bicornis) on dark background taken near Al Sham Street in Onaiza area. Doha, Qatar, June 3, 2015
 Spikelet of grass Awnless barnyard grass (Echinochloa colona?) in silty depression on roadside of a road from Dukhan to Al Jumayliyah. Western Qatar, March 1, 2014
 Back lit spike of field sandbur grass (Cenchrus spinifex) on shores of Lake Somerville near Birch Creek Unit of Somerville Lake State Park. Texas, October 4, 2022
 Coastal sandbur (Cenchrus spinifex) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2014
 Close up of sandburs spikelet (Cenchrus spinifex) in Lake Bryan Park. Bryan, Texas, October 19, 2009
 Fruits of common sandbur (Cenchrus spinifex) in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 25, 2014
 Close up of a spike of African foxtail grass (buffelgrass, Cenchrus pennisetiformis) in a runnel north from Dukhan. Qatar, February 20, 2016
 Aeluropus lagopoides grass taken from Al Sham Street in area of West Bay. Doha, Qatar, August 16, 2014
 Fountain grass (Pennisetum setaceum) near Al Sham Street in West Bay. Doha, Qatar, October 20, 2014
 Spikelet of winter wild oat (Avena sterilis) taken from area of Al Sham Street in West Bay. Doha, Qatar, March 4, 2015
 Halophytic grass Aeluropus lagopoides taken from Al Sham Street in area of West Bay. Doha, Qatar, August 16, 2014
 Finger grass (Chloris virgata) collected from Al Sham Street in West Bay. Doha, Qatar, September 8, 2014
 Buffelgrass (African foxtail grass, Cenchrus pennisetiformis) at entrance of Ras Abrouq Peninsula near Zekreet. Qatar, November 14, 2014
 Shoot of centipede grass (Eremochloa ophiuroides) near Majlis Al Taawon Street in West Bay. Doha, Qatar, April 19, 2014
 Finger grass (Chloris virgata) with red aphids on Al Sham Street in area of West Bay. Doha, Qatar, April 11, 2014
 Creeping centipede grass (Eremochloa ophiuroides) near Majlis Al Taawon Street in West Bay. Doha, Qatar, April 19, 2014
 Close up of a spike of Centropodia fragilis grass growing on sand mounds near Inland Sea Road. Southern Qatar, March 5, 2014
 Buffelgrass (African foxtail grass, Cenchrus pennisetiformis) in Al Luqta area. Doha, Qatar, March 13, 2015
 Finger grass (feather windmillgrass, Chloris virgata) on Al Sham Street in area of West Bay. Doha, Qatar, April 11, 2014
 Mat of common salt grass (Aeluropus lagopoides) near leaking water pipes on Al Sham Street in West Bay. Doha, Qatar, September 5, 2014
 Awnless barnyard grass (Echinochloa colona, local names dhunaiba, abu roukba) near Al Istiqlal Street in West Bay. Doha, Qatar, May 5, 2014
 Close up of Cornulaca aucheri(?) taken from a roadside of Al Istiqlal Street in West Bay. Doha, Qatar, April 25, 2014
 Spikelet of some grass on Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. South-western Qatar, October 25, 2014
 Close up of a spikelet of Hindi grass (Diaz bluestem, Dichanthium annulatum) in a silty depression on roadside of a road to Zubara, area of Al Magdah farms. Northern Qatar, October 24, 2015
 Grass spikelet of Sorghum halepense(?) taken from a place with water leakage in Al Luqta area. Doha, Qatar, March 13, 2015
 Buffelgrass (African foxtail grass, Cenchrus pennisetiformis) with a stone fence background in Al Luqta area. Doha, Qatar, March 13, 2015
 Close up of paperflower (Bougainvillea glabra) on Al Sham Street in area of West Bay. Doha, Qatar, April 11, 2014
 Close up of Graceful Sandmat (spurge, Euphorbia hypericifolia) taken from area of Al Istiqlal Street in West Bay. Doha, Qatar, May 1, 2014
 African foxtail grass (buffelgrass, Cenchrus pennisetiformis) on the border of Green Circles (center-pivot irrigation) in Irkhaya Farms. South-western Qatar, March 29, 2014
 Close up of petty spurge (Euphorbia peplus) taken from a roadside of Al Sham Street in area of West Bay. Doha, Qatar, April 16, 2014
 Sandburs spikelet (Cenchrus spinifex) on roadside of Road 364, near Sugarloaf Mountain. Gause, Texas, September 20, 2008
 Close up of flower buds of velvetleaf (Abutilon pannosum var. figarianum) taken from area behind gas station on Al Sham Street in West Bay. Doha, Qatar, November 16, 2014
 Close up of seeds of velvetleaf (Abutilon pannosum var. figarianum) collected from area behind gas station on Al Sham Street in West Bay. Doha, Qatar, September 8, 2014
 Common sandbur (Cenchrus spinifex) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 6, 2009
 Common sandbur (Cenchrus spinifex) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 2, 2020
 Coastal sandbur (Cenchrus spinifex) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 15, 2019
 Ashwagandha plant (Withania somnifera) on Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Common sandbur (Cenchrus spinifex) near Ferry Road in Washington-on-the-Brazos State Historic Site. Washington, Texas, July 31, 2021
 Dry spikelet of grass in Lick Creek Park. College Station, Texas, July 26, 2014
 Ashwagandha plant (Withania somnifera) with fruits on Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, March 2, 2016
 Fruits of Ashwagandha plant (Withania somnifera) on Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Flowers of Ashwagandha plant (Withania somnifera) on Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Sandburs spikelet (Cenchrus spinifex) taken from a lawn near apartments at George Bush Drive. College Station, Texas, September 30, 2012
 Ripe fruits of Ashwagandha plant (Withania somnifera) taken from Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Large bush of Ashwagandha plant (Withania somnifera) on Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, March 2, 2016
 Ashwagandha plant (Withania somnifera) near a stone building on Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Detached red berries of Ashwagandha plant (Withania somnifera) taken from Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Leaves of cultivated sweet potato (Ipomoea batatas) on Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Ripening fruits of Ashwagandha plant (Withania somnifera) on Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Spikelets of little seed canary grass (Phalaris minor) taken from southern section of Al Eithar Street in Onaiza area. Doha, Qatar, June 15, 2015
 Close up of bristly foxtail grass (Setaria verticillata) taken from Al Mawrid Street in Al Lejbailat area. Doha, Qatar, May 26, 2016
 Fruits of Ashwagandha plant (Withania somnifera) on white background taken from Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Close up of rabbitsfoot grass (Polypogon monspeliensis)(?) taken from eastern Al Jood Street in Onaiza area. Doha, Qatar, April 7, 2015
 Grass spikelet on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, July 13, 2014
 Bitter melon (Momordica charantia) cultivated in a small kitchen garden on Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Sandburs spikelet (Cenchrus spinifex) in Bastrop State Park. Bastrop, Texas, September 10, 2020
 Spikelets of little seed canary grass (Phalaris minor) on black background taken from southern section of Al Eithar Street in Onaiza area. Doha, Qatar, June 15, 2015
 Close up of Hindi grass (Diaz bluestem, Dichanthium annulatum) on Al Mawrid Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Spikelet of foxtail millet grass (Setaria italica) on Park Hudson Trail. College Station, Texas, August 6, 2014
 Foxtail millet grass (Setaria italica) spikelet in dew on Park Hudson Trail. College Station, Texas, August 6, 2014
 Field of cultivated sweet potato (Ipomoea batatas) in a small kitchen garden on Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Leaf of bitter melon (Momordica charantia) cultivated in a small kitchen garden on Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Flower of bitter melon (Momordica charantia) cultivated in a small kitchen garden on Al Muhandiseen Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Spikelet of sweet corn (Zea mays)(?) on Ibn Nusaih Street in Onaiza area. Doha, Qatar, March 13, 2015
 Sandburs spikelet (Cenchrus spinifex) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 3, 2008
 Close up of a spike of Hindi grass (Diaz bluestem, Dichanthium annulatum) on Al Mawrid Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
 Bristly spikelet of foxtail millet grass (Setaria italica) in Lick Creek Park. College Station, Texas, August 3, 2014
 Spikelet of sweet corn (Zea mays)(?) on white background taken from Ibn Nusaih Street in Onaiza area. Doha, Qatar, March 13, 2015
 Spikelet of sweet corn (Zea mays)(?) on Al Jood Street near corner with Saha 16 in Onaiza area. Doha, Qatar, March 8, 2015
 Spikelet of sweet corn (Zea mays)(?) on white background taken from Ibn Nusaih Street in Onaiza area. Doha, Qatar, March 13, 2015
 Close up of a spike of Hindi grass (Diaz bluestem, Dichanthium annulatum) on white background taken from Al Mawrid Street in Al Lejbailat area. Doha, Qatar, February 25, 2016
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