Family: Sapindaceae

Origin, Description & Uses
Native to southern China through Malesia, rambutan (Nephelium lappaceum) is a tropical evergreen fruit tree prized for its unusual, colorful fruits covered in soft hair-like spines. The tree typically grows 40–80 feet tall with dense, glossy foliage and produces clusters of sweet, juicy fruits that are popular fresh, canned, or used in desserts and beverages. Rambutan is widely cultivated throughout Southeast Asia and other tropical regions as a commercial fruit crop and backyard orchard tree. In Hawaiʻi, it is grown primarily for home use and small-scale specialty fruit production, valued for both its ornamental appearance and flavorful fruit.

Risks & Threats
Rambutan is considered a low risk species for Hawaiʻi. While seeds may occasionally sprout near cultivated trees where fruit is discarded or eaten by animals, the species has not shown strong invasive tendencies in the islands. It generally requires warm, wet tropical conditions and ongoing care for successful establishment. At this time, rambutan is not known to form dense wild populations or significantly threaten native ecosystems. As with many cultivated fruit trees, responsible management and proper disposal of unwanted fruit can help minimize any potential for spread.

High Risk Traits:

• Tolerates many soil types (except waterlogged)
  
• Shade tolerant at some life stages
  
• Self-compatible
  
• Seeds dispersed intentionally by humans
  
• Seeds survive gut passage (mammals/bats)
  
• Host for pests and pathogens

Low Risk Traits:

• Not naturalized or weedy in native/agricultural systems
  
• No evidence of weediness (garden, agricultural, or environmental)
  
• No spines, thorns, or burrs
  
• Not toxic to humans or animals
  
• Does not form dense thickets
  
• Seeds recalcitrant (no persistent seed bank)
  
• Large fruit/seed limits dispersal (mainly humans & mammals)
  
• Takes 5–6 years to bear fruit when grown from seed