Brown Cobblestone Lichen vs Rootless Duckweed

Acarospora fuscata compared with Wolffia arrhiza

Key Differences

Brown Cobblestone Lichen is Least Concern while Rootless Duckweed is Endangered.

Taxonomic Classification

Rank	Brown Cobblestone Lichen	Rootless Duckweed
Kingdom	Fungi (Fungi)	Plantae (Plants)
Phylum	Ascomycota (Sac Fungi)	Magnoliophyta (Flowering Plants)
Class	Lecanoromycetes (Lecanoromycetes)	Liliopsida (Monocots)
Order	Acarosporales (Acarosporales)	Alismatales (Alismatales)
Family	Acarosporaceae	Araceae
Genus	Acarospora	Wolffia
Species	Acarospora fuscata	Wolffia arrhiza

Conservation Status

Brown Cobblestone Lichen

LC — Least Concern

Rootless Duckweed

EN — Endangered

Physical Characteristics

Attribute	Brown Cobblestone Lichen	Rootless Duckweed
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.

Rootless Duckweed

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, temperate broadleaf and mixed forests, and temperate coniferous forests, among 4 distinct biome types spanning the Indomalayan and Oceanian and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Japan), Europe (10 countries), North America (Canada), and South America (Brazil). 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.