Family: Arecaceae

Origin, Description & Uses
Euterpe oleracea, commonly known as açaí or assai palm, is a slender, multi-stemmed palm native to the floodplains and wetlands of northern South America, especially the Amazon Basin. It typically grows in clumps and can reach heights of 50–80 feet, with graceful fronds and smooth, ringed trunks. The species is best known for its small, dark purple fruits, which are widely harvested and marketed as “açaí berries” for their nutritional value. These fruits are used in juices, smoothies, and health products, while the palm is also occasionally planted as an ornamental in tropical landscapes.

Risks & Threats
Although Euterpe oleracea is not currently known to be naturalized in Hawaii, it possesses traits that raise some concern. As a prolific fruit producer adapted to wet environments, it could potentially spread in suitable habitats, particularly in riparian or lowland wet areas. Seeds are dispersed by birds and other animals, increasing the likelihood of escape from cultivation. Its ability to form dense clumps may also allow it to outcompete native vegetation under favorable conditions. Further evaluation is needed to determine whether this species could establish and impact Hawaii’s ecosystems.

High Risk Traits:

• Naturalizing outside of a botanical garden in Panama (within native range)
  
• Thrives in tropical climates
  
• Shade-tolerant
  
• Tolerates many soil conditions (and potentially able to exploit many different habitat types)
  
• Forms dense and extensive stands
  
• Self-compatible
  
• Fruits consumed and seeds dispersed by birds and mammals
  
• Seeds also water dispersed
  
• Produces suckers and resprouts after cutting

Low Risk Traits:

• No negative impacts have been documented
  
• Unarmed (no spines, thorns or burrs)
  
• Non-toxic
  
• Commercially valuable fruit (edible and source of juice)
  
• Landscaping and ornamental value
  
• Reaches reproductive maturity in 4+ years
  
• Will not form a persistent seed bank