Castor vs Greater knapweed

Ricinus communis compared with Centaurea scabiosa

Key Differences

• Castor is Not Evaluated while Greater knapweed is Near Threatened.

Taxonomic Classification

Rank	Castor	Greater knapweed
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Malpighiales (Malpighiales)	Asterales (Daisies & Sunflowers)
Family	Euphorbiaceae	Asteraceae (Daisy Family)
Genus	Ricinus	Centaurea
Species	Ricinus communis	Centaurea scabiosa

Evolutionary Relationship

Castor and Greater knapweed share a common ancestor at the Class level: Magnoliopsida. (Dicots)

Conservation Status

Castor

NE — Not Evaluated

Greater knapweed

NT — Near Threatened

Physical Characteristics

Attribute	Castor	Greater knapweed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Castor

Habitat

Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 7 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (33 countries), Asia (26 countries), Europe (23 countries), North America (15 countries), Oceania and the Pacific (14 countries), and South America (12 countries).

Greater knapweed

Habitat

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

Range

Widely distributed across Europe (7 countries), North America (Canada, United States), and Oceania and the Pacific (Australia). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Castor

The Castor (Ricinus communis) is a species in the genus Ricinus. Found across multiple habitat types including tropical and subtropical dry broadleaf forests, flooded grasslands and savannas, and montane grasslands and shrublands, among 7 distinct biome types. Populations are also found in montane and hi

Shared Countries

Both species can be found in 7 countries:

🇦🇺 Australia 🇦🇹 Austria 🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden 🇺🇸 United States