Boreal Button Lichen vs Christmasbush

Buellia disciformis compared with Alchornea cordifolia

Key Differences

Boreal Button Lichen is Critically Endangered while Christmasbush is Least Concern.

Taxonomic Classification

Rank	Boreal Button Lichen	Christmasbush
Kingdom	Fungi (균계)	Plantae (식물)
Phylum	Ascomycota (자낭균류)	Magnoliophyta (피자식물문)
Class	Lecanoromycetes (요강버섯강)	Magnoliopsida (목련강)
Order	Caliciales (Caliciales)	Malpighiales (말피기아목)
Family	Caliciaceae	Euphorbiaceae
Genus	Buellia	Alchornea
Species	Buellia disciformis	Alchornea cordifolia

Conservation Status

Boreal Button Lichen

CR — Critically Endangered

Christmasbush

LC — Least Concern

Physical Characteristics

Attribute	Boreal Button Lichen	Christmasbush
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Boreal Button Lichen

Habitat

Inhabits temperate broadleaf and mixed forests and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

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

Christmasbush

Habitat

Inhabits tropical and subtropical moist broadleaf forests and flooded grasslands and savannas within the Afrotropic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Cameroon and Guinea.

Boreal Button Lichen

The Boreal Button Lichen (Buellia disciformis) is a species in the genus Buellia. It is currently classified as Critically Endangered on the IUCN Red List. Inhabits temperate broadleaf and mixed forests and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Christmasbush

Christmasbush (Bursaria spinosa) is a native Australian shrub or small tree in the family Pittosporaceae, widely distributed across southeastern Australia. The species is found in a variety of habitats including dry sclerophyll woodland, grassland margins, and coastal heath, growing in well-drained soils. It produces dense clusters of small, fragrant white flowers typically in summer or early autumn, which coincide with the Australian Christmas season and give rise to one of its common names. The flowers are rich in nectar and attract a wide diversity of insects including native bees, butterflies, and beetles, making Bursaria spinosa one of the most ecologically significant flowering shrubs in southeastern Australian woodlands for invertebrate communities. The plant is also a critical larval host for several butterfly species, including the rare golden sun moth. Bursaria spinosa is a pioneering species in disturbed landscapes and is used in revegetation and ecological restoration projects. Its dense, thorny branches provide protective nesting habitat for small birds. The species tolerates poor soils and periods of drought once established. It has no significant conservation concerns and is common throughout its range.