Coastal Ragweed vs Redhead

Ambrosia hispida compared with Aythya americana

Key Differences

Coastal Ragweed is Least Concern while Redhead is Not Evaluated.

Taxonomic Classification

Rank	Coastal Ragweed	Redhead
Kingdom	Plantae (식물)	Animalia (동물)
Phylum	Magnoliophyta (피자식물문)	Chordata (척삭동물)
Class	Magnoliopsida (목련강)	Aves (새)
Order	Asterales (국화목)	Anseriformes (기러기목)
Family	Asteraceae (Daisy Family)	Anatidae
Genus	Ambrosia	Aythya
Species	Ambrosia hispida	Aythya americana

Conservation Status

Coastal Ragweed

LC — Least Concern

Redhead

NE — Not Evaluated

Physical Characteristics

Attribute	Coastal Ragweed	Redhead
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Coastal Ragweed

Habitat

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

Range

Found in Cuba.

Redhead

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found across Europe (7 countries) and North America (United States).

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.