Blue Cycad vs Coastal Ragweed

Encephalartos nubimontanus compared with Ambrosia hispida

Key Differences

• Blue Cycad is Extinct in the Wild while Coastal Ragweed is Least Concern.

Taxonomic Classification

Rank	Blue Cycad	Coastal Ragweed
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum	Tracheophyta	Magnoliophyta (Flowering Plants)
Class	Cycadopsida (Cycadopsida)	Magnoliopsida (Dicots)
Order	Cycadales (Cycadales)	Asterales (Daisies & Sunflowers)
Family	Zamiaceae	Asteraceae (Daisy Family)
Genus	Encephalartos	Ambrosia
Species	Encephalartos nubimontanus	Ambrosia hispida

Evolutionary Relationship

Blue Cycad and Coastal Ragweed share a common ancestor at the Kingdom level: Plantae. (Plants)

Conservation Status

Blue Cycad

EW — Extinct in the Wild

Coastal Ragweed

LC — Least Concern

Physical Characteristics

Attribute	Blue Cycad	Coastal Ragweed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blue Cycad

Coastal Ragweed

Habitat

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

Range

Found in Cuba.

Blue Cycad

The Blue Cycad (Encephalartos nubimontanus) is a species in the genus Encephalartos. It is currently classified as Extinct in the Wild on the IUCN Red List. As a member of the genus Encephalartos, it shares ecological traits with closely related species.

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.