Bladder Fern vs Brook Alder

Cystopteris fragilis compared with Alnus maritima

Key Differences

• Bladder Fern is Not Evaluated while Brook Alder is Endangered.

Taxonomic Classification

Rank	Bladder Fern	Brook Alder
Kingdom same	Plantae (planta)	Plantae (planta)
Phylum	Tracheophyta	Magnoliophyta (Flowering Plants)
Class	Polypodiopsida (Polypodiopsida)	Magnoliopsida (Dicots)
Order	Polypodiales (Polypodiales)	Fagales (Beeches & Oaks)
Family	Cystopteridaceae	Betulaceae
Genus	Cystopteris	Alnus
Species	Cystopteris fragilis	Alnus maritima

Evolutionary Relationship

Bladder Fern and Brook Alder share a common ancestor at the Kingdom level: Plantae. (planta)

Conservation Status

Bladder Fern

NE — Not Evaluated

Brook Alder

EN — Endangered

Physical Characteristics

Attribute	Bladder Fern	Brook Alder
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bladder Fern

Habitat

Typically found in moist, shaded forest floors and tropical canopies.

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), North America (Canada, United States), and South America (Colombia).

Brook Alder

Habitat

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

Range

Distributed across Belgium, France, Netherlands, and United Kingdom. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Bladder Fern

The Bladder Fern (Cystopteris fragilis) is a species in the genus Cystopteris. Typically found in moist, shaded forest floors and tropical canopies.

Brook Alder

The Brook Alder (Alnus maritima) is a species in the genus Alnus. It is currently classified as Endangered 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:

🇧🇪 Belgium 🇫🇷 France