Family: Myrtaceae

High Risk Traits:

• Metrosideros kermadecensis is naturalized outside native range (Hawaiʻi, Norfolk Island, Lord Howe Island)
  
• Pest species on Maui and Category 4 weed on Lord Howe Island
  
• Congeneric (M. excelsa) is a declared weed in South Africa
  
• Repeated introductions outside native range
  
• Wind-dispersed seeds
  
• Prolific seed production (>1000/m²)
  
• Produces viable seed
  
• Broad climate suitability
  
• Highly suited to tropical/subtropical climates
  
• Palatable to grazing animals

Low Risk Traits:

• No spines, thorns, or burrs
  
• Not toxic to animals or humans
  
• Not shade tolerant (requires full sun)
  
• No vegetative fragmentation
  
• Not water-, bird-, or animal-dispersed
  
• No fire hazard