Birch Bristle Bracket vs Coastal Ragweed

Phellinus lundellii compared with Ambrosia hispida

Key Differences

• Birch Bristle Bracket is Critically Endangered while Coastal Ragweed is Least Concern.

Taxonomic Classification

Rank	Birch Bristle Bracket	Coastal Ragweed
Kingdom	Fungi (Fungi)	Plantae (Plants)
Phylum	Basidiomycota (Club Fungi)	Magnoliophyta (Flowering Plants)
Class	Agaricomycetes (Mushrooms)	Magnoliopsida (Dicots)
Order	Hymenochaetales (Hymenochaetales)	Asterales (Daisies & Sunflowers)
Family	Hymenochaetaceae	Asteraceae (Daisy Family)
Genus	Phellinus	Ambrosia
Species	Phellinus lundellii	Ambrosia hispida

Conservation Status

Birch Bristle Bracket

CR — Critically Endangered

Coastal Ragweed

LC — Least Concern

Physical Characteristics

Attribute	Birch Bristle Bracket	Coastal Ragweed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Birch Bristle Bracket

Habitat

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

Range

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

Coastal Ragweed

Habitat

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

Range

Found in Cuba.

Birch Bristle Bracket

The Birch Bristle Bracket (Phellinus lundellii) is a species in the genus Phellinus. It is currently classified as Critically Endangered on the IUCN Red List. Inhabits tropical and subtropical moist broadleaf forests within the Indomalayan biogeographic realm.

Coastal Ragweed

Coastal ragweed (Ambrosia hispida) is a perennial herb in the family Asteraceae, native to the coastal dunes, sandy beaches, and cays of Cuba, the Bahamas, and the wider Caribbean region. It grows in pioneer beach and dune vegetation, often forming spreading colonies that help stabilise loose coastal sands. Like other members of the genus Ambrosia, it bears inconspicuous greenish-white flowers arranged in racemes; male flower heads produce wind-dispersed pollen that can trigger allergic rhinitis in sensitive individuals. The deeply lobed, hispid leaves are adapted to reflect intense solar radiation and tolerate salt spray. Coastal ragweed plays an ecological role in early dune succession, binding sand and enabling other plant species to establish. The genus is widespread globally, with several Ambrosia species considered noxious weeds in agricultural settings, though Ambrosia hispida is restricted to its native Caribbean coastal range. The IUCN assesses it as Least Concern, reflecting adequate population size across its Caribbean coastal distribution. Pressure from coastal development and tourism infrastructure poses a localised threat to dune communities it inhabits.