broad blysmus vs Coastal Ragweed

Blysmus compressus compared with Ambrosia hispida

Key Differences

• broad blysmus is Endangered while Coastal Ragweed is Least Concern.

Taxonomic Classification

Rank	broad blysmus	Coastal Ragweed
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class	Liliopsida (Monocots)	Magnoliopsida (Dicots)
Order	Poales (Grasses)	Asterales (Daisies & Sunflowers)
Family	Cyperaceae	Asteraceae (Daisy Family)
Genus	Blysmus	Ambrosia
Species	Blysmus compressus	Ambrosia hispida

Evolutionary Relationship

broad blysmus and Coastal Ragweed share a common ancestor at the Phylum level: Magnoliophyta. (Flowering Plants)

Conservation Status

broad blysmus

EN — Endangered

Coastal Ragweed

LC — Least Concern

Physical Characteristics

Attribute	broad blysmus	Coastal Ragweed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

broad blysmus

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Currently classified as 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.

broad blysmus

The Broad blysmus (Blysmus compressus) is a species in the genus Blysmus. It is currently classified as Endangered on the IUCN Red List. Typically found in grasslands, wetlands, forests, and cultivated landscapes.

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.