Blue star vs

Amsonia orientalis compared with Usnea cornuta

Key Differences

• Blue star is Critically Endangered while is Near Threatened.

Taxonomic Classification

Rank	Blue star
Kingdom	Plantae (Pflanzen)	Fungi (Pilze)
Phylum	Magnoliophyta (Flowering Plants)	Ascomycota (Schlauchpilze)
Class	Magnoliopsida (Dicots)	Lecanoromycetes (Lecanoromycetes)
Order	Gentianales (Enzianartige)	Lecanorales (Lecanorales)
Family	Apocynaceae	Parmeliaceae
Genus	Amsonia	Usnea
Species	Amsonia orientalis	Usnea cornuta

Conservation Status

Blue star

CR — Critically Endangered

NT — Near Threatened

Physical Characteristics

Attribute	Blue star
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blue star

Habitat

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

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway, Portugal, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Blue star

The Blue star (Amsonia orientalis) is a species in the genus Amsonia. It is currently classified as Critically Endangered on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Usnea cornuta is a fruticose lichen in the family Parmeliaceae, assessed as Near Threatened (NT). It forms shrubby, branching thalli that hang from tree branches and twigs, typically in humid forest environments. Like all Usnea species, it is highly sensitive to air pollution, particularly sulfur dioxide, making it a useful bioindicator of air quality.