Brown Cobblestone Lichen vs Ray's Knotgrass

Acarospora fuscata compared with Polygonum oxyspermum

Key Differences

• Brown Cobblestone Lichen is Least Concern while Ray's Knotgrass is Endangered.

Taxonomic Classification

Rank	Brown Cobblestone Lichen	Ray's Knotgrass
Kingdom	Fungi (Fungi)	Plantae (Plants)
Phylum	Ascomycota (Sac Fungi)	Magnoliophyta (Flowering Plants)
Class	Lecanoromycetes (Lecanoromycetes)	Magnoliopsida (Dicots)
Order	Acarosporales (Acarosporales)	Caryophyllales (Caryophyllales)
Family	Acarosporaceae	Polygonaceae
Genus	Acarospora	Polygonum
Species	Acarospora fuscata	Polygonum oxyspermum

Conservation Status

Brown Cobblestone Lichen

LC — Least Concern

Ray's Knotgrass

EN — Endangered

Physical Characteristics

Attribute	Brown Cobblestone Lichen	Ray's Knotgrass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brown Cobblestone Lichen

Habitat

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

Range

Distributed across Denmark, Norway, Portugal, and United States.

Ray's Knotgrass

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

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

Brown Cobblestone Lichen

The Brown Cobblestone Lichen (Acarospora fuscata) is a species in the genus Acarospora. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Shared Countries

Both species can be found in 2 countries:

🇩🇰 Denmark 🇳🇴 Norway