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  • COMMON NAME: Persian knotweed, silver-sheath knotweed.
  • ARABIC: قرضاب
  • BOTANICAL NAME: Polygonum argyrocoleum Steud. ex Kuntze
  • SYNONYMS: Polygonum deciduum
  • FAMILY: POLYGONACEAE
  • KIND: Native
  • EMIRATE: Abu-Dhabi , Fujairah
  • GROWTH FORMS: Herbs
  • HABITATS: Terrace Sandy
  • TYPES: Annual
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/polygonum_argyrocoleon.htm
Glabrous annual herb, 20-50 cm high. Stems erect or ascending purplish from the neck, the lower internodes longer than ochreae and leaves. Ochreae short, brownish at base, 6-8 partite, translucent tapering at apex. Leaves 0.5-3 cm long, 2-6 mm wide, deciduous, lanceolate tapering both sides acute, 1-nerved; leaf subtending flowers much shorter than the flowers. Flowers 1-5 at the nodes, borne on pedicels longer than the perianth. Perianth segments nearly hooded, greenish medially, white-margined below, closed when fruiting. Seed small ovoid, 3-angled, smooth, shining, not punctate. Flowering from February to April.
Gardens, farms, waste places.
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