Coastal Ragweed vs

Ambrosia hispida compared with Planococcus citreus

Key Differences

• Coastal Ragweed is Least Concern while is Not Evaluated.

Taxonomic Classification

Rank	Coastal Ragweed
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Arthropoda (Arthropods)
Class	Magnoliopsida (Dicots)	Insecta (Insects)
Order	Asterales (Daisies & Sunflowers)	Hemiptera (Hemiptera)
Family	Asteraceae (Daisy Family)	Pseudococcidae
Genus	Ambrosia	Planococcus
Species	Ambrosia hispida	Planococcus citreus

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

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found in 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.

Planococcus citreus is a lemon-yellow pigmented, Gram-positive coccus distinguished by its motility via peritrichous flagella, an unusual trait among cocci. It inhabits marine coastal environments and is commonly found in seawater and marine sediments. This aerobic bacterium obtains nutrients by decomposing organic matter in saline environments.