Coastal Ragweed vs Dumb-Nettle

Ambrosia hispida compared with Galinsoga parviflora

Key Differences

• Coastal Ragweed is Least Concern while Dumb-Nettle is Not Evaluated.

Taxonomic Classification

Rank	Coastal Ragweed	Dumb-Nettle
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order same	Asterales (Daisies & Sunflowers)	Asterales (Daisies & Sunflowers)
Family same	Asteraceae (Daisy Family)	Asteraceae (Daisy Family)
Genus	Ambrosia	Galinsoga
Species	Ambrosia hispida	Galinsoga parviflora

Evolutionary Relationship

Coastal Ragweed and Dumb-Nettle share a common ancestor at the Family level: Asteraceae. (Daisy Family)

Conservation Status

Coastal Ragweed

LC — Least Concern

Dumb-Nettle

NE — Not Evaluated

Physical Characteristics

Attribute	Coastal Ragweed	Dumb-Nettle
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.

Dumb-Nettle

Habitat

Inhabits deserts and xeric shrublands within the Afrotropic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (26 countries), Asia (22 countries), Europe (37 countries), North America (Canada, Dominican Republic, United States), Oceania and the Pacific (Australia, Papua New Guinea, Vanuatu), and South America (5 countries).

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.