Family: Cupressaceae

High Risk Traits:

• Broad climate suitability
  
• Thrives in tropical climates
  
• Naturalizing on Oahu and Maui, Hawaiian Islands
  
• A potential agricultural weed which may reduce pasture productivity
  
• Other Callitris species have invasive tendencies
  
• Gum may be toxic if ingested. Pollen may be allergenic to susceptible individuals
  
• Tolerates many soil types
  
• Forms dense stands in native range
  
• Reproduces by seed, and possibly by suckering
  
• Seeds dispersed by wind, water and intentionally by people
  
• May seed prolifically in certain years (although not in excess of 1000 seeds m-2)
  
• Older trees may be resistant to fire. Younger trees are killed

Low Risk Traits:

• Unarmed (no spines, thorns or burrs)
  
• Palatable and non-toxic to browsing animals
  
• Reduces fire risk
  
• Relatively slow-growing. Reaches maturity after 6+ years
  
• Limited dispersibility of seeds
  
• Does not form a persistent seed bank