Douglas's Knotweed (Polygonum douglasii) wildspecies.ca

Secure

Present in regions

Migratory species: Unknown

Taxonomic group:

Vascular plants

Learn more about all species of Vascular plants in Canada.

The General Status ranks do not have legal weight. They are meant to identify the species that may be at risk in Canada.

Access other data on this species on the NatureServe Explorer.

Common Names

English common name:

Douglas's Knotweed

French common name:

Renouée de Douglas

Year	English common name	French common name
2005	Douglas' Knotweed	Renouée de Douglas
2010	Douglas' Knotweed	Renouée de Douglas
2015	Douglas's Knotweed	Renouée de Douglas
2020	Douglas's Knotweed	Renouée de Douglas

Source: iNaturalist

Scientific Names

Higher Classification:

Superkingdom

EUKARYOTA

Kingdom

PLANTAE

Subkingdom

VIRIDIPLANTAE

Infrakingdom

STREPTOPHYTA

Superphylum

Embryophyta

Phylum

Tracheophyta

Subphylum

Spermatophytina

Superclass

Angiospermae

Class

Magnoliopsida

Superorder

Caryophyllanae

Year	Scientific name	Family	Order
2005	Polygonum douglasii	Polygonaceae	Polygonales
2010	Polygonum douglasii	Polygonaceae	Polygonales
2015	Polygonum douglasii	Polygonaceae	Caryophyllales
2020	Polygonum douglasii	Polygonaceae	Caryophyllales

Priority Score

This species is not designated as may be at risk

Trends in rounded national ranks

Year	Rounded National Rank	Description of the change	Reason for change	Notes
2005	Secure
2010	Secure
2015	Secure
2020	Secure

Original Ranks:

Canada
2005	Secure - 4
2010	Secure - 4
2015	Secure - N5
2020	Secure - N5

Yukon
2005	May Be At Risk - 2
2010	May Be At Risk - 2
2015	Critically Imperiled - S1
2020	Critically Imperiled - S1

Northwest Territories
2005	Not Present
2010	Not Present
2015	Not Present
2020	Not Present

Nunavut
2005	Not Present
2010	Not Present
2015	Not Present
2020	Not Present

British Columbia
2005	Secure - 4
2010	Secure - 4
2015	Secure - S5
2020	Secure - S5

Alberta
2005	Secure - 4
2010	Secure - 4
2015	Vulnerable - S3
2020	Vulnerable - S3

Saskatchewan
2005	Secure - 4
2010	Secure - 4
2015	Apparently Secure - S4?
2020	Apparently Secure - S4?

Manitoba
2005	Secure - 4
2010	Secure - 4
2015	Vulnerable - S3S4
2020	Vulnerable - S3S4

Ontario
2005	Secure - 4
2010	Secure - 4
2015	Apparently Secure - S4
2020	Apparently Secure - S4

Quebec
2005	May Be At Risk - 2
2010	May Be At Risk - 2
2015	Vulnerable - S3
2020	Vulnerable - S3

New Brunswick
2005	Not Present
2010	Not Present
2015	Not Present
2020	Critically Imperiled - S1

Nova Scotia
2005	Not Present
2010	Not Present
2015	Not Present
2020	Not Present

Prince Edward Island
2005	Not Present
2010	Not Present
2015	Not Present
2020	Not Present

Newfoundland and Labrador
2005	Not Present
2010	Not Present
2015
2020

Labrador
2005
2010
2015	Not Present
2020	Not Present

Newfoundland
2005
2010
2015	Not Present
2020	Not Present

Pacific Ocean
2005	Not Present
2010	Not Present
2015	Not Present
2020	Not Present

Western Arctic Ocean
2005	Not Present
2010	Not Present
2015	Not Present
2020	Not Present

Eastern Arctic Ocean
2005	Not Present
2010	Not Present
2015	Not Present
2020	Not Present

Atlantic Ocean
2005	Not Present
2010	Not Present
2015	Not Present
2020	Not Present