Blue-Gray Rosette Lichen vs Brook Floater

Physcia caesia compared with Alasmidonta varicosa

Key Differences

Blue-Gray Rosette Lichen is Least Concern while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Blue-Gray Rosette Lichen	Brook Floater
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Mollusca (Mollusks)
Class	Lecanoromycetes (Lecanoromycetes)	Bivalvia (Bivalvia)
Order	Caliciales (Caliciales)	Unionida (Unionida)
Family	Physciaceae	Unionidae
Genus	Physcia	Alasmidonta
Species	Physcia caesia	Alasmidonta varicosa

Conservation Status

Blue-Gray Rosette Lichen

LC — Least Concern

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Blue-Gray Rosette Lichen	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blue-Gray Rosette Lichen

Habitat

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

Range

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

Brook Floater

Habitat

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

Range

Found in United States. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Blue-Gray Rosette Lichen

The Blue Gray Rosette Lichen (Physcia caesia) is a species in the genus Physcia. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Brook Floater

The Brook Floater (Alasmidonta varicosa) is a species in the genus Alasmidonta. It is currently classified as Vulnerable on the IUCN Red List. Native to North America, inhabiting ecosystems characteristic of the region.