Flowers of Christ s Thorn Jujube (Sidra tree, Ziziphus spina-christi) on Al Sham Street in area of West Bay. Doha, Qatar, April 17, 2014
Flowers of desert thorn Lycium shawii near a road to Zubara in area of Al Magdah farms. Northern Qatar, February 13, 2016
Sensitive brier (Schrankia uncinata) with a pinkish red fluffy flower ball on a thorn-covered stem on Little Lake Creek Loop Trail in Sam Houston National Forest. Richards, Texas, June 22, 2008
Close up of a flower of Christ s Thorn Jujube (Sidra tree, Ziziphus spina-christi) collected near Dareen Tower in West Bay. Doha, Qatar, February 1, 2014
Flower of Madras thorn acacia (Pithecellobium dulce) found near Dar Al Salam Compound, Abu Hamour area. Doha, Qatar, May 10, 2013
Flowers of Christ s Thorn Jujube (Sidra tree, Ziziphus spina-christi) collected near Dareen Tower in West Bay. Doha, Qatar, February 1, 2014
Twig with flowers of Christ s Thorn Jujube (Sidra tree, Ziziphus spina-christi) taken from Al Sham Street in area of West Bay. Doha, Qatar, April 17, 2014
Flowers of desert thorn Lycium shawii at entrance of Ras Abrouq Peninsula near Zekreet. Qatar, November 14, 2014
Female flowers of Prickly Dock (Emex spinosa) with three thorns on Green Circles (center-pivot irrigation) in Irkhaya Farms. Qatar, January 16, 2015
Flowers of Madras thorn acacia (Pithecellobium dulce) near Barzan Towers. Doha, Qatar, March 7, 2015
Fruits and a flower of sand button (creeping thorn rose, Neurada procumbens, local name saadan) taken from desert on the border of Green Circles (center-pivot irrigation) in Irkhaya (Irkaya) Farms. Qatar, March 14, 2015
Flowers of crown of thorns (Euphorbia milii, Euphorbia splendens) in Al Shamal City Park. Ruwais, Northern Qatar, April 3, 2015
Flowers of desert thorn (Lycium shawii, local name Awsaj) east from Al Jebail water treatment plant. Al Khor, Qatar, December 20, 2015
Flower of desert thorn Lycium shawii near a road to Zubara in area of Al Magdah farms. Northern Qatar, February 13, 2016
Branch of desert thorn Lycium shawii with flowers near a road to Zubara in area of Al Magdah farms. Northern Qatar, February 13, 2016
Sand button (creeping thorn rose, Neurada procumbens, local name saadan) with a white flower on sand dunes near the spring in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, March 18, 2016
Flowers of thorn acacia (Acacia ehrenbergiana, local name Salam) in a green depression in Harrarah (Al Kharrarah). Southern Qatar, April 23, 2016
White flowers of crown of thorns (Euphorbia milii) in greenhouses of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, February 23, 2017
