Blackthorn Dotty vs Brook Alder

Polystigma rubrum compared with Alnus maritima

Key Differences

• Blackthorn Dotty is Least Concern while Brook Alder is Endangered.

Taxonomic Classification

Rank	Blackthorn Dotty	Brook Alder
Kingdom	Fungi (Fungi)	Plantae (Plants)
Phylum	Ascomycota (Sac Fungi)	Magnoliophyta (Flowering Plants)
Class	Sordariomycetes (Sordariomycetes)	Magnoliopsida (Dicots)
Order	Phyllachorales (Phyllachorales)	Fagales (Beeches & Oaks)
Family	Phyllachoraceae	Betulaceae
Genus	Polystigma	Alnus
Species	Polystigma rubrum	Alnus maritima

Conservation Status

Blackthorn Dotty

LC — Least Concern

Brook Alder

EN — Endangered

Physical Characteristics

Attribute	Blackthorn Dotty	Brook Alder
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blackthorn Dotty

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Brook Alder

Habitat

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

Range

Distributed across Belgium, France, Netherlands, and United Kingdom. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Blackthorn Dotty

The Blackthorn Dotty (Polystigma rubrum) is a species in the genus Polystigma. It is currently classified as Least Concern on the IUCN Red List. Distributed across Denmark, Norway, and Sweden.

Brook Alder

The Brook Alder (Alnus maritima) is a species in the genus Alnus. It is currently classified as Endangered on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.