Polygonaceae
Polygonum

Polygonum cognatum Meisn.

First published in Monogr. Polyg.: 91 (1826)
This species is accepted
The native range of this species is E. Medit. to Mongolia and Nepal. It is a perennial and grows primarily in the temperate biome.

Distribution

Native to:

Afghanistan, Altay, Inner Mongolia, Iran, Iraq, Kazakhstan, Kirgizstan, Lebanon-Syria, Mongolia, Nepal, North Caucasus, Pakistan, Palestine, Tadzhikistan, Transcaucasus, Turkmenistan, Türkiye, Uzbekistan, West Himalaya, Xinjiang

Introduced into:

Baltic States, Bulgaria, France, Great Britain

Accepted Infraspecifics

Classification

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Publications

POWO follows these authorities in accepting this name:

  • Akeroyd, J.R. (2013). Docks and Knotweeds of Britain and Ireland: 1-258. Botanical Society of Britain and Ireland.
  • Danin, A. & Fragman- Sapir, O. (2019). Flora of Israel Online http://flora.org.il/en/plants/.
  • Dar, G.H. & Govaerts, R.H.A. (2025). Flora of Kashmir Himalaya: Sind Valley 2: 607-1262. Bishen Singh Mahendra Pal Singh, Dehradun, India.
  • Davis, P.H. (ed.) (1967). Flora of Turkey and the East Aegean Islands 2: 1-581. Edinburgh University Press, Edinburgh.
  • Ghazanfar, S.A. & Edmandson, J.R. (eds.) (2016). Flora of Iraq 5(1): 1-284. Ministry of Agriculture & Agrarian Reform, Baghdad.
  • Krasnoborov, I.M. & Malyshev, L.I. (2003). Flora of Siberia 5: 1-305. Scientific Publishers, Inc., Enfield, Plymouth.
  • Mehboob-ur-Rahman (2012). Wild plants of Swat, Pakistan 1: 1-281. Department of botany, govt. Jehanzeb post graduate college.
  • Rajbhandari, K.R., Rai, S.K. & Chhetri, R. (2021). A Handbook of the Flowering Plants of Nepal 3: 1-331. Department of Plant Resources, Thapathali, Kathmandu, Nepal.
  • Stace, C. (2019). New Flora of the British Isles ed. 4: 1-1266. C & M Floristics.
  • Stalažs, A. (2024). List of vascular plants of Latvia (with Latvian names): 1-312. Dobele.
  • Tutin, T.G. & al. (eds.) (1993). Flora Europaea ed. 2, 1: 1-581. Cambridge University Press.
  • Wu, Z. & Raven, P.H. (eds.) (2003). Flora of China 5: 1-505. Science Press (Beijing) & Missouri Botanical Garden Press (St. Louis).
  • Zhao, Y.Z., Zhao, L.Q. & Rui, C. (eds.) (2019). Flora Intramongolica, edition 3, 1: 1-779. Typis Intramongolicae popularis, Huhhot.

Flora of Iraq

  • Breckle et al., Vasc. Pl. Afghan. Checkl.: 407 (2013).
  • Coode & Cullen in Fl Turk. 2: 276 (1967)
  • Li Anjen et al. in Fl. China 5: 284 (2003)
  • Meisn., Monogr. Polyg. 91 (1826)
  • Qaiser in Fl. Pak. 205: 83 (2001)

Kew Backbone Distributions

  • Akeroyd, J.R. (2013). Docks and Knotweeds of Britain and Ireland: 1-258. Botanical Society of Britain and Ireland.
  • B.A.Fedtschenko & al. (1937). Flora Turkmenii 2: 1-217. Turkmenskoe gosudarstvennoe izd., Ashkhabad.
  • Danin, A. & Fragman- Sapir, O. (2019). Flora of Israel Online http://flora.org.il/en/plants/.
  • Davis, P.H. (ed.) (1967). Flora of Turkey and the East Aegean Islands 2: 1-581. Edinburgh University Press, Edinburgh.
  • Krasnoborov, I.M. & Malyshev, L.I. (2003). Flora of Siberia 5: 1-305. Scientific Publishers, Inc., Enfield, Plymouth.
  • Litvinskaya, S.A. & Murtazaliev, R.A. (2013). Flora of the Northern Caucasus: An Atlas and Identification Book: 1-688. Fiton XXI.
  • Qaiser, M. (2001). Flora of Pakistan 205: 1-190. Department of Botany, University of Karachi, Karachi.
  • Rajbhandari, K.R., Rai, S.K. & Chhetri, R. (2021). A Handbook of the Flowering Plants of Nepal 3: 1-331. Department of Plant Resources, Thapathali, Kathmandu, Nepal.
  • Rechinger, K.H. & Schiman-Czeika, H. (1968). Flora Iranica 56: 1-88. Akademische Druck- u. Verlagsanstalt, Graz.
  • Stalažs, A. (2024). List of vascular plants of Latvia (with Latvian names): 1-312. Dobele.
  • Tutin, T.G. & al. (eds.) (1993). Flora Europaea ed. 2, 1: 1-581. Cambridge University Press.
  • Wu, Z. & Raven, P.H. (eds.) (2003). Flora of China 5: 1-505. Science Press (Beijing) & Missouri Botanical Garden Press (St. Louis).

Other Data

Other Kew resources that provide information on this taxon:

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • Flora of Iraq

    • Ghazanfar, S. A., Edmondson, J. R. (Eds). (2013-2019). Flora of Iraq, Volumes 5.1, 5.2 and 6.0. Kew Publishing
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2026. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2026. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Science Photographs

    • Copyright applied to individual images