Family: Salicaceae

High Risk Traits:

• Broad climate suitability
  
• Naturalized in Australia
  
• Regarded as an environmental weed of riparian environments in Australia
  
• Other Salix species have become invasive in Australia
  
• Tolerates many soil types (as long as moisture content is high)
  
• Able to form pure stands
  
• Produces viable seeds
  
• Able to hybridize with other Salix species
  
• Able to sucker and spread by vegetative fragments
  
• Seeds dispersed by wind and water, and intentionally by people
  
• Prolific seed production in native range
  
• Able to coppice and resprout after cutting or fires

Low Risk Traits:

• A temperate species that may only pose a threat to higher elevations of tropical islands
  
• Unarmed (no spines, thorns or burrs)
  
• Palatable to a variety of browsing animals
  
• Non-toxic to animals and people (although pollen may be an allergen)
  
• Ornamental
  
• Shade-intolerant
  
• Dioecious (and therefore self-incompatible)
  
• Reaches maturity in 10+ years
  
• Seeds lose viability quickly
  
• Herbicides provide effective control