Polygonaceae
Narrowleaf knotweed
Polygonum bellardii
- Family
- Polygonaceae
- Genus
- Polygonum
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Common names
By language (7)
- Arabic
- قردب
- English
- Narrowleaf knotweed
- Finnish
- Eteläntatar
- Latvian
- Bellarda sūrene
- Russian
- Горец Белларди
- Slovenian
- Kitaibelova dresen
- Swedish
- Busktrampört
Synonyms
- Polygonum agrestinum Jord. ex Boreau
- Polygonum aviculare var. virgatum Peterm.
- Polygonum kitaibelianum Sadler
- Polygonum nervosum Wallr.
- Polygonum novoascanicum Klokov
- Polygonum patulum subsp. bordzilowskii Soó
- Polygonum patulum subsp. kitaibelianum Asch. & Graebn.
- Polygonum rectum (Chrtek) Scholz
- Polygonum rectum subsp. virgatum H.Scholz
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Annual
- In the US and Canada
- Canada: native, Lower 48 states: introduced
Photos
Photo: ÖkopatóPál, CC0, from iNaturalist
More in Polygonum
- Yard knotweedPolygonum avicularePolygonaceae
- Oval-leaf knotweedPolygonum arenastrumPolygonaceae
- Polygonum maritimumPolygonaceae
- Asiatic tearthumbPolygonum perfoliatumPolygonaceae
- Bellard's smartweedPolygonum patulumPolygonaceae
- European knotweedPolygonum arenariumPolygonaceae
- Polygonum cognatumPolygonaceae
- Horse-tail knotweedPolygonum equisetiformePolygonaceae
- KnotweedPolygonum oxyspermumPolygonaceae
- Douglas' knotweedPolygonum douglasiiPolygonaceae
- Erect knotweedPolygonum erectumPolygonaceae
- Polygonum humifusumPolygonaceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.