Black-stemmed Goldendrop vs Castor

Onosma nigricaulis compared with Ricinus communis

Key Differences

• Black-stemmed Goldendrop is Critically Endangered while Castor is Not Evaluated.

Taxonomic Classification

Rank	Black-stemmed Goldendrop	Castor
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Boraginales (Boraginales)	Malpighiales (Malpighiales)
Family	Boraginaceae	Euphorbiaceae
Genus	Onosma	Ricinus
Species	Onosma nigricaulis	Ricinus communis

Evolutionary Relationship

Black-stemmed Goldendrop and Castor share a common ancestor at the Class level: Magnoliopsida. (Dicots)

Conservation Status

Black-stemmed Goldendrop

CR — Critically Endangered

Castor

NE — Not Evaluated

Physical Characteristics

Attribute	Black-stemmed Goldendrop	Castor
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-stemmed Goldendrop

Habitat

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

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).

Black-stemmed Goldendrop

The Black-stemmed Goldendrop (Onosma nigricaulis) is a species in the genus Onosma. It is currently classified as Critically Endangered 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