Coastal Ragweed vs

Ambrosia hispida compared with Nitzschia angularis

Key Differences

Coastal Ragweed is Least Concern while is Not Evaluated.

Taxonomic Classification

Rank	Coastal Ragweed
Kingdom	Plantae (plantas)	Chromista (Chromista)
Phylum	Magnoliophyta (Flowering Plants)	Ochrophyta (Ochrophyta)
Class	Magnoliopsida (Dicots)	Bacillariophyceae (Bacillariophyceae)
Order	Asterales (Daisies & Sunflowers)	Bacillariales (Bacillariales)
Family	Asteraceae (Daisy Family)	Bacillariaceae
Genus	Ambrosia	Nitzschia
Species	Ambrosia hispida	Nitzschia angularis

Conservation Status

Coastal Ragweed

LC — Least Concern

NE — Not Evaluated

Physical Characteristics

Attribute	Coastal Ragweed
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.

Habitat

Native to Asia and Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Brazil, Norway, Sweden, and Taiwan.

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.

Nitzschia angularis e uma diatomea penada de agua doce alongada com polos angulares e um rafe distintivo posicionado ao longo da quilha do frustulo. Habita ambientes de agua doce eutroficos a mesotroficos, incluindo rios, lagoas e lagos enriquecidos em nutrientes. Esta diatomea fotosintetica esta associada a condicoes de agua doce moderadamente enriquecidas.