Alpine Bladder-fern vs Brook Floater

Cystopteris alpina compared with Alasmidonta varicosa

Key Differences

• Alpine Bladder-fern is Near Threatened while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Alpine Bladder-fern	Brook Floater
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Tracheophyta	Mollusca (Mollusks)
Class	Polypodiopsida (Polypodiopsida)	Bivalvia (Bivalvia)
Order	Polypodiales (Polypodiales)	Unionida (Unionida)
Family	Cystopteridaceae	Unionidae
Genus	Cystopteris	Alasmidonta
Species	Cystopteris alpina	Alasmidonta varicosa

Conservation Status

Alpine Bladder-fern

NT — Near Threatened

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Alpine Bladder-fern	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Alpine Bladder-fern

Habitat

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

Range

Distributed across Norway and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Brook Floater

Habitat

Native to North America, inhabiting ecosystems characteristic of the region.

Range

Found in United States. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Alpine Bladder-fern

The Alpine Bladder-fern (Cystopteris alpina) is a species in the genus Cystopteris. It is currently classified as Near Threatened on the IUCN Red List. Typically found in moist, shaded forest floors and tropical canopies. Distributed across Norway and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Brook Floater

The Brook Floater (Alasmidonta varicosa) is a species in the genus Alasmidonta. It is currently classified as Vulnerable on the IUCN Red List. Native to North America, inhabiting ecosystems characteristic of the region.