limestone fern vs Pacific Oak Fern

Gymnocarpium robertianum compared with Gymnocarpium disjunctum

Key Differences

• limestone fern is Critically Endangered while Pacific Oak Fern is Not Evaluated.

Taxonomic Classification

Rank	limestone fern	Pacific Oak Fern
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Tracheophyta	Tracheophyta
Class same	Polypodiopsida (Polypodiopsida)	Polypodiopsida (Polypodiopsida)
Order same	Polypodiales (Polypodiales)	Polypodiales (Polypodiales)
Family same	Cystopteridaceae	Cystopteridaceae
Genus same	Gymnocarpium	Gymnocarpium
Species	Gymnocarpium robertianum	Gymnocarpium disjunctum

Evolutionary Relationship

limestone fern and Pacific Oak Fern share a common ancestor at the Genus level: Gymnocarpium.

Conservation Status

limestone fern

CR — Critically Endangered

Pacific Oak Fern

NE — Not Evaluated

Physical Characteristics

Attribute	limestone fern	Pacific Oak Fern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

limestone fern

Habitat

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

Range

Distributed across Belgium, Canada, Norway, and Sweden. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Pacific Oak Fern

Habitat

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

Range

Distributed across Canada, Norway, and United States.

Shared Countries

Both species can be found in 2 countries:

🇨🇦 Canada 🇳🇴 Norway