Bloodwort vs Ray's Knotgrass

Achillea millefolium compared with Polygonum oxyspermum

Key Differences

• Bloodwort is Least Concern while Ray's Knotgrass is Endangered.

Taxonomic Classification

Rank	Bloodwort	Ray's Knotgrass
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Asterales (Daisies & Sunflowers)	Caryophyllales (Caryophyllales)
Family	Asteraceae (Daisy Family)	Polygonaceae
Genus	Achillea	Polygonum
Species	Achillea millefolium	Polygonum oxyspermum

Evolutionary Relationship

Bloodwort and Ray's Knotgrass share a common ancestor at the Class level: Magnoliopsida. (Dicots)

Conservation Status

Bloodwort

LC — Least Concern

Ray's Knotgrass

EN — Endangered

Physical Characteristics

Attribute	Bloodwort	Ray's Knotgrass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bloodwort

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and flooded grasslands and savannas, among 11 distinct biome types spanning the Indomalayan and Neotropic and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (South Africa), Asia (4 countries), Europe (10 countries), North America (5 countries), Oceania and the Pacific (Australia), and South America (4 countries).

Ray's Knotgrass

Habitat

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

Range

Distributed across Denmark, Norway, and Sweden. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Bloodwort

The Bloodwort (Achillea millefolium) is a species in the genus Achillea. It is currently classified as Least Concern on the IUCN Red List. Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and flooded grasslands and savannas, among 11 distinct biome types spanning the Indomalayan and Neotropic and Palearctic real

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden