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  • COMMON NAME: Caltrop
  • ARABIC: قطب
  • BOTANICAL NAME: Tribulus macropterus Boiss
  • SYNONYMS: T. longipetalus Viv. var.macropterus
  • FAMILY: ZYGOPHYLLACEAE
  • KIND: Native
  • EMIRATE: Abu-Dhabi , Dubai
  • GROWTH FORMS: Herbs
  • HABITATS: Sandy
  • TYPES: Perennial
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. https://www.floraofqatar.com/tribulus_macropterus.htm
Densely villous, prostrate herb, with long stems, up to 40 cm long. Leaves not closely placed on the stems. Flowers 10-12 mm in diameter. Pedicel up to 1.5 cm long. Sepals lanceolate, 5-6 mm long. Petals obovate, about 6 mm long. Fruit 7-9 mm in diameter, wings of mericarps irregularly toothed, pubescent, not broader than carpels. Very similar to T.omanense Hosni, but differ in their glabrescent, toothed or Entire-margined, carpel wings and deciduous calyces. Flowering from February to June and October to November.
Sand and gravel plains.
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