Bristly Haircap vs Common Haircap

Polytrichum piliferum compared with Polytrichum commune

Taxonomic Classification

Rank	Bristly Haircap	Common Haircap
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Bryophyta	Bryophyta
Class same	Polytrichopsida (Polytrichopsida)	Polytrichopsida (Polytrichopsida)
Order same	Polytrichales (Polytrichales)	Polytrichales (Polytrichales)
Family same	Polytrichaceae	Polytrichaceae
Genus same	Polytrichum	Polytrichum
Species	Polytrichum piliferum	Polytrichum commune

Evolutionary Relationship

Bristly Haircap and Common Haircap share a common ancestor at the Genus level: Polytrichum.

Conservation Status

Bristly Haircap

LC — Least Concern

Common Haircap

LC — Least Concern

Physical Characteristics

Attribute	Bristly Haircap	Common Haircap
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bristly Haircap

Habitat

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

Range

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

Common Haircap

Habitat

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

Range

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

Bristly Haircap

The Bristly Haircap (Polytrichum piliferum) is a species in the genus Polytrichum. It is currently classified as Least Concern on the IUCN Red List. Native to Asia and Europe and North America, inhabiting ecosystems characteristic of the region.

Common Haircap

The common haircap, <em>Polytrichum commune</em>, is a moss belonging to the family Polytrichaceae, one of the largest and most structurally complex families within the division Bryophyta. This species is widely distributed across Asia, Europe, North America, and South America, making it one of the most cosmopolitan mosses in the world. <em>Polytrichum commune</em> is typically found in moist to wet habitats including bogs, fens, wet heathlands, and the margins of streams and woodland ponds. It is characterized by its tall, upright gametophytes, which can reach several centimeters in height, and its distinctive star-shaped arrangement of leaves when dry. The species is assessed as Least Concern on the IUCN Red List. No dietary information has been provided for this species. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 8 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇱🇺 Luxembourg 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden 🇹🇼 Taiwan 🇺🇸 United States