Arctic Butterbur vs Castor

Petasites frigidus compared with Ricinus communis

Key Differences

• Arctic Butterbur is Least Concern while Castor is Not Evaluated.

Taxonomic Classification

Rank	Arctic Butterbur	Castor
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Asterales (Daisies & Sunflowers)	Malpighiales (Malpighiales)
Family	Asteraceae (Daisy Family)	Euphorbiaceae
Genus	Petasites	Ricinus
Species	Petasites frigidus	Ricinus communis

Evolutionary Relationship

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

Conservation Status

Arctic Butterbur

LC — Least Concern

Castor

NE — Not Evaluated

Physical Characteristics

Attribute	Arctic Butterbur	Castor
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Arctic Butterbur

Habitat

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

Range

Distributed across Finland, Norway, Sweden, and United States.

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).

Arctic Butterbur

The Arctic Butterbur (Petasites frigidus) is a species in the genus Petasites. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

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 3 countries:

🇳🇴 Norway 🇸🇪 Sweden 🇺🇸 United States