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  • COMMON NAME: Puncture vine, caltrop.
  • ARABIC: قطب، حسك، أبو ضريس
  • BOTANICAL NAME: Tribulus terrestris L.
  • SYNONYMS: Tribulus acanthococcus
  • FAMILY: ZYGOPHYLLACEAE
  • KIND: Introduced
  • EMIRATE: Abu-Dhabi , Dubai , Sharjah , Ajman , Ras-Al-Khaimah , Fujairah
  • CATEGORIES: Medicinal (M) Fodder (F) Fruits (F) Apiculture (A)
  • GROWTH FORMS: Herbs
  • HABITATS: Wadi Sandy
  • TYPES: Annual
  • REMARKS: Wadi Wurayah National Park (WWNP). Plants used by honeybees for nectar collection for honey production.
Karim FM and Dakheel AG. Salt-tolerant plants of the United Arab Emirates. 2006. International Center for Biosaline Agriculture, Dubai, UAE. https://www.floraofqatar.com/tribulus_terrestris.htm V.V. Byalt, V.M. Korshunov, M.V. Korshunov. Cadaster of the Flora of Fujairah Emirate (United Arab Emirates). Al Fujairah 2021. Flora of the United Arab Emirates V1 & 2, Fawzi M.Karim, Nael M.Fawzi; reviewed by Fatima Al-Ansary. Al-Ain: United Arab Emirates University, 2007. Gary R. Feulner. 2014. The Flora of Wadi Wurayah National Park Fujairah, United Arab Emirates.
Highly salt tolerant, grazable plant with many known uses in folk medicine. Honey nectar plants.
Low, annual, grey-green, pilose herb. Stems prostrate, with spreading branches, up to 40cm across. Leaves opposite, 4-8cm long, unequal; leaflets 3-8 pairs, 3- 7mm long, oblong, mucronate, hairy beneath, less above, rounded-oblique at the base. Peduncles, 6-12mm long. Flowers solitary, axillary or leaf-opposed. Sepals minute, lanceolate, acute, hairy. Petals yellow, 4-8mm long obovate. Stamens 10; stigma subsessile, mostly pyramidal. Fruit globose in outline, 6-8mm in diameter, somewhat keeled and crested at back, with 2-4 straight, terete, strong, long, prickles. Flowering from February to April and September to November.
A weed in fields, orchards, salty wadis and desert roadsides.
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