Back Varkgras Afrikaans عصا الراعي Arabic عصا الراعى ARZ Polygonum aviculare AST Quş qırxbuğumu Azerbaijani قوش قیرخ بوغومو AZB Күгүлән Bashkir Takžuolė BAT-SMG Драсён птушыны Byelorussian Пача трева Bulgarian
| Common knotgrass | |
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Polygonaceae |
| Genus: | Polygonum |
| Species: | P. aviculare
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| Binomial name | |
| Polygonum aviculare L. 1753
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| Synonyms[1] | |
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Synonymy
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Polygonum aviculare or common knotgrass is a plant related to buckwheat and dock. It is also called prostrate knotweed, birdweed, pigweed and lowgrass. It is an annual found in fields and wasteland, with white flowers from June to October. It is widespread across many countries in temperate regions, apparently native to Eurasia, naturalized in temperate parts of the Southern Hemisphere.[2][3][4][5][6][7]
- ^ The Plant List, Polygonum aviculare L.
- ^ Flora of China, Polygonum aviculare Linnaeus, 1753. 萹蓄 bian xu
- ^ Flora of North America, Polygonum aviculare Linnaeus, 1753. Doorweed, knotgrass, renouée des oiseaux
- ^ Atlas of Living Australia, Polygonum aviculare L., Wireweed
- ^ Altervista Flora Italiana, Polygonum aviculare L. includes photos and European distribution map
- ^ Lindau, G. 1894. Beiträge zur argentinischen Flora. Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 19(4, Beibl. 48): 8–23 descriptions and geographic information in Latin, commentary in German
- ^ Gibbs Russell, G. E., W. G. M. Welman, E. Retief, K. L. Immelman, G. Germishuizen, B. J. Pienaar, M. Van Wyk & A. Nicholas. 1987. List of species of southern African plants. Memoirs of the Botanical Survey of South Africa 2(1–2): 1–152(pt. 1), 1–270(pt. 2).