Bladder Fern vs Caucasian Alder

Cystopteris fragilis compared with Alnus subcordata

Key Differences

• Bladder Fern is Not Evaluated while Caucasian Alder is Least Concern.

Taxonomic Classification

Rank	Bladder Fern	Caucasian Alder
Kingdom same	Plantae (Plants)	Plantae (Plants)
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 subcordata

Evolutionary Relationship

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

Conservation Status

Bladder Fern

NE — Not Evaluated

Caucasian Alder

LC — Least Concern

Physical Characteristics

Attribute	Bladder Fern	Caucasian 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).

Caucasian Alder

Habitat

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

Bladder Fern

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

Caucasian Alder

The Caucasian Alder (Alnus subcordata) 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.