Douglas' Knotweed vs Lesser Red-knotgrass

Polygonum douglasii compared with Polygonum arenarium

Taxonomic Classification

Rank	Douglas' Knotweed	Lesser Red-knotgrass
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order same	Caryophyllales (Caryophyllales)	Caryophyllales (Caryophyllales)
Family same	Polygonaceae	Polygonaceae
Genus same	Polygonum	Polygonum
Species	Polygonum douglasii	Polygonum arenarium

Evolutionary Relationship

Douglas' Knotweed and Lesser Red-knotgrass share a common ancestor at the Genus level: Polygonum.

Conservation Status

Douglas' Knotweed

NE — Not Evaluated

Lesser Red-knotgrass

NE — Not Evaluated

Physical Characteristics

Attribute	Douglas' Knotweed	Lesser Red-knotgrass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Douglas' Knotweed

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Distributed across Canada and United States.

Lesser Red-knotgrass

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found across Europe (11 countries) and North America (United States).

Shared Countries

Both species can be found in 1 countries:

🇺🇸 United States