Bitter Flax vs Brook-Side Alder

Linum catharticum compared with Alnus serrulata

Key Differences

• Bitter Flax is Endangered while Brook-Side Alder is Least Concern.

Taxonomic Classification

Rank	Bitter Flax	Brook-Side Alder
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Malpighiales (Malpighiales)	Fagales (Beeches & Oaks)
Family	Linaceae	Betulaceae
Genus	Linum	Alnus
Species	Linum catharticum	Alnus serrulata

Evolutionary Relationship

Bitter Flax and Brook-Side Alder share a common ancestor at the Class level: Magnoliopsida. (Dicots)

Conservation Status

Bitter Flax

EN — Endangered

Brook-Side Alder

LC — Least Concern

Physical Characteristics

Attribute	Bitter Flax	Brook-Side Alder
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bitter Flax

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, temperate broadleaf and mixed forests, and temperate grasslands and steppes, among 8 distinct biome types spanning the Neotropic and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Europe (7 countries), North America (Canada, United States), Oceania and the Pacific (Australia), and South America (Argentina, Chile). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Brook-Side Alder

Habitat

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

Range

Distributed across Canada and United States.

Bitter Flax

The Bitter Flax (Linum catharticum) is a species in the genus Linum. It is currently classified as Endangered on the IUCN Red List. Found across multiple habitat types including tropical and subtropical moist broadleaf forests, temperate broadleaf and mixed forests, and temperate grasslands and steppes, among 8 distinct biome types spanning the Neotropic and Palearctic

Brook-Side Alder

The Brook-Side Alder (Alnus serrulata) is a species in the genus Alnus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Shared Countries

Both species can be found in 2 countries:

🇨🇦 Canada 🇺🇸 United States