Family: Arecaceae

Origin, Description & Uses
Manicaria saccifera (troolie palm, sometimes called royal palm) is native to Trinidad and the tropical regions of Central and South America. It typically grows in lowland freshwater swamps and wet forested areas, where it forms dense stands. This striking palm is known for its very large, stiff, fan-like leaves that can reach several meters in length. Unlike many palms, its leaves are often undivided, giving it a bold, architectural appearance. Traditionally, the leaves have been widely used for thatching roofs—especially in Caribbean and Amazonian communities—where “troolie roofs” are valued for their durability and water resistance. The plant is also culturally important in some regions for weaving and local construction materials.

Risks & Threats
This species is considered low risk because it has very specific habitat requirements and does not show signs of being invasive outside its native range. It is not known to be naturalized in Hawaiʻi, and its preference for swampy, lowland wetland environments limits its ability to spread widely in most landscapes. There are currently no significant ecological threats associated with Manicaria saccifera in non-native regions. However, as with any introduced species, monitoring is still useful to ensure it does not establish in sensitive wetland areas or displace native vegetation if it were ever introduced.

High Risk Traits:

• Native to tropics
  
• Produces viable seed
  
• Water-dispersed seeds (float, sea-beans in Florida)
  
• Sold intentionally online
  
• Tolerates fire (slash-and-burn)

Low Risk Traits:

• Not naturalized elsewhere
  
• Not a weed
  
• No spines, thorns, or burrs
  
• Non-toxic, non-allergenic
  
• Not a fire hazard (swamp habitat)
  
• Not wind- or animal-dispersed (large seeds)