Andersson's arctic moss vs Compressed Flapwort

Arctoa anderssonii compared with Nardia compressa

Key Differences

• Andersson's arctic moss is Endangered while Compressed Flapwort is Least Concern.

Taxonomic Classification

Rank	Andersson's arctic moss	Compressed Flapwort
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum	Bryophyta	Marchantiophyta (liverwort)
Class	Bryopsida (Bryopsida)	Jungermanniopsida (Jungermanniopsida)
Order	Dicranales (Dicranales)	Jungermanniales (Jungermanniales)
Family	Rhabdoweisiaceae	Gymnomitriaceae
Genus	Arctoa	Nardia
Species	Arctoa anderssonii	Nardia compressa

Evolutionary Relationship

Andersson's arctic moss and Compressed Flapwort share a common ancestor at the Kingdom level: Plantae. (Plants)

Conservation Status

Andersson's arctic moss

EN — Endangered

Compressed Flapwort

LC — Least Concern

Physical Characteristics

Attribute	Andersson's arctic moss	Compressed Flapwort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Andersson's arctic moss

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

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

Compressed Flapwort

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Norway, and Sweden.

Andersson's arctic moss

The Andersson's arctic moss (Arctoa anderssonii) is a species in the genus Arctoa. It is currently classified as Endangered on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

Compressed Flapwort

<em>Nardia compressa</em>, commonly called the Compressed Flapwort, is a leafy liverwort in the family Jungermanniaceae, a lineage of non-vascular land plants (division Marchantiophyta) that diverged from other embryophytes over 400 million years ago. This small, mat-forming bryophyte typically colonizes moist, acidic substrates along stream banks, seepages, and wet rock faces in cool-temperate habitats throughout Europe. Its flattened, overlapping leaves give the plant a compressed appearance, which inspired both its common and scientific names. Like all liverworts, <em>Nardia compressa</em> lacks true vascular tissue and absorbs water and nutrients directly through its leaf surfaces, deriving energy through photosynthesis rather than heterotrophic feeding. The species has been recorded in Belgium, Norway, and Sweden, suggesting an affinity for the moist, boreal and Atlantic climatic zones of northwestern and northern Europe. It is currently assessed as Least Concern by the IUCN, indicating no immediate extinction risk across its known range. Biological traits including individual lifespan, reproductive rates, and specific growth measurements remain poorly documented relative to vascular plant species, though liverworts are generally slow-growing perennial organisms tightly dependent on stable moisture regimes.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇸🇪 Sweden