Bent Ring Lichen vs Blackboard Tree

Arctoparmelia incurva compared with Alstonia scholaris

Key Differences

Bent Ring Lichen is Critically Endangered while Blackboard Tree is Least Concern.

Taxonomic Classification

Rank	Bent Ring Lichen	Blackboard Tree
Kingdom	Fungi (Fungi)	Plantae (Plants)
Phylum	Ascomycota (Sac Fungi)	Magnoliophyta (Flowering Plants)
Class	Lecanoromycetes (Lecanoromycetes)	Magnoliopsida (Dicots)
Order	Lecanorales (Lecanorales)	Gentianales (Gentianales)
Family	Parmeliaceae	Apocynaceae
Genus	Arctoparmelia	Alstonia
Species	Arctoparmelia incurva	Alstonia scholaris

Conservation Status

Bent Ring Lichen

CR — Critically Endangered

Blackboard Tree

LC — Least Concern

Physical Characteristics

Attribute	Bent Ring Lichen	Blackboard Tree
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bent Ring Lichen

Habitat

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

Range

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

Blackboard Tree

Habitat

Inhabits tropical and subtropical moist broadleaf forests and tropical and subtropical dry broadleaf forests within the Oceanian biogeographic realm.

Range

Distributed across Micronesia, Taiwan, and United States.

Bent Ring Lichen

The Bent Ring Lichen (Arctoparmelia incurva) is a species in the genus Arctoparmelia. It is currently classified as Critically Endangered on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Blackboard Tree

The Blackboard Tree (Alstonia scholaris) is a species in the genus Alstonia. It is currently classified as Least Concern on the IUCN Red List. Inhabits tropical and subtropical moist broadleaf forests and tropical and subtropical dry broadleaf forests within the Oceanian biogeographic realm.