Hard Shield Fern vs Kwakiutl's holly fern

Polystichum aculeatum compared with Polystichum kwakiutlii

Key Differences

• Hard Shield Fern is Near Threatened while Kwakiutl's holly fern is Extinct.

Taxonomic Classification

Rank	Hard Shield Fern	Kwakiutl's holly fern
Kingdom same	Plantae (tumbuhan)	Plantae (tumbuhan)
Phylum same	Tracheophyta	Tracheophyta
Class same	Polypodiopsida (Polypodiopsida)	Polypodiopsida (Polypodiopsida)
Order same	Polypodiales (Polypodiales)	Polypodiales (Polypodiales)
Family same	Dryopteridaceae	Dryopteridaceae
Genus same	Polystichum	Polystichum
Species	Polystichum aculeatum	Polystichum kwakiutlii

Evolutionary Relationship

Hard Shield Fern and Kwakiutl's holly fern share a common ancestor at the Genus level: Polystichum.

Conservation Status

Hard Shield Fern

NT — Near Threatened

Kwakiutl's holly fern

EX — Extinct

Physical Characteristics

Attribute	Hard Shield Fern	Kwakiutl's holly fern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Hard Shield Fern

Habitat

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

Range

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

Kwakiutl's holly fern

Habitat

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

Range

Found in Canada.