Polygonum majus
Large Douglas' Knotweed, Large Knotweed
Other regional names: Palouse Knotweed +1 more
- Palouse Knotweed
- Wiry Knotweed
Also known as: Polygonum coarctatum var. majus Meisn. +2 more
- Polygonum coarctatum var. majus Meisn.
- Polygonum coarctatum var. minus Meisn.
- Polygonum douglasii subsp. majus (Meisn.) J.C.Hickman
Botanical Data
- Taxonomic Rank: Species
- Botanical Family: Polygonaceae
- WCVP Morphological Data: Recorded natively as a annual.
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Polygonum majus (commonly known as large Douglas' knotweed or Large Knotweed) is an annual belonging to the Polygonaceae family. Indigenous to North America, this species is primarily associated with temperate conditions.
Macro Climate
Temperate
Plant Type
Annual
Native Range
Continents (WGSRPD)
NORTHERN AMERICA
Regions (WGSRPD)
Northwestern U.S.A., Southwestern U.S.A., Western Canada
Botanical Countries (WGSRPD L3)
British Columbia, California, Colorado, Idaho, Nevada, Oregon, Utah, Washington, Wyoming