Family: Myrtaceae

High Risk Traits:

• Broad climate suitability
  
• Grows, and spreads, in regions with tropical climates
  
• Naturalized on Kauai, Oahu, Molokai, Maui, and Hawaii (Hawaiian Islands), and elsewhere
  
• An environmental weed in South Africa, invading and modifying riparian habitats
  
• Other Eucalyptus species are invasive
  
• Allelopathic
  
• Highly flammable (may increase fire risk)
  
• Tolerates many soil types
  
• Reproduces by seeds
  
• Hybridizes with other Eucalyptus species
  
• Capable of selfing (with reduced seed set)
  
• Reaches maturity in 3 years
  
• Seeds dispersed by water, wind and intentionally by people
  
• Coppices after cutting, but reported to be killed by fire

Low Risk Traits:

• Despite widespread planting and naturalization, not reported as an environmental weed in the Hawaiian Islands
  
• Unarmed (no spines, thorns, or burrs)
  
• May be browsed by animals if other foods are unavailable
  
• Thrives in full sun (dense shade may limit ability to establish and spread)
  
• Not reported to spread vegetatively
  
• Forms a small short-lived seed bank