Coastal Ragweed vs Rice

Ambrosia hispida compared with Oryza sativa

Key Differences

• Coastal Ragweed is Least Concern while Rice is Not Evaluated.

Taxonomic Classification

Rank	Coastal Ragweed	Rice
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class	Magnoliopsida (Dicots)	Liliopsida (Monocots)
Order	Asterales (Daisies & Sunflowers)	Poales (Grasses)
Family	Asteraceae (Daisy Family)	Poaceae (Grass Family)
Genus	Ambrosia	Oryza (Rice)
Species	Ambrosia hispida	Oryza sativa

Evolutionary Relationship

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

Conservation Status

Coastal Ragweed

LC — Least Concern

Rice

NE — Not Evaluated

Trend: Stable →

Physical Characteristics

Attribute	Coastal Ragweed	Rice
Diet	—	Autotroph
Average Lifespan	—	1 years
Average Length	—	1.2 m
Average Weight	—	—

Habitat & Geographic Range

Coastal Ragweed

Habitat

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

Range

Found in Cuba.

Rice

Habitat

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

Range

Widely distributed across Africa (12 countries), Asia (5 countries), Europe (11 countries), North America (Belize, United States), Oceania and the Pacific (Australia), 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.

Rice

The most important food crop in human history, rice feeds over half the world's population and is the staple grain of Asia, Africa, and Latin America. Domesticated from wild Oryza rufipogon approximately 9,000 years ago in the Yangtze River valley of China, rice cultivation has shaped civilizations, landscapes, and ecosystems. Its flooded paddy cultivation creates extensive wetland habitats for migratory birds, amphibians, and aquatic invertebrates while producing significant methane emissions.