Family: Rosaceae

High Risk Traits:

• Elevation range exceeds 1000 m, demonstrating environmental versatility
  
• Naturalized in Canada, New Zealand, Patagonia, Alaska and possibly elsewhere
  
• Controlled as an environmental weed in Alaska
  
• Other Sorbus species are invasive
  
• Host for pests and pathogens of Rosaceae
  
• Seeds may be toxic
  
• Tolerates many soil types
  
• Seedlings and sapling are Shade-tolerant
  
• Capable for forming pure stands
  
• Reproduces by seeds
  
• Hybridizes with other Sorbus species
  
• Seeds dispersed by birds, mammals, water and intentionally by people
  
• Seeds may persist in soil for 5 years
  
• Able to coppice and resprout after cutting

Low Risk Traits:

• From cooler, temperate climates. May only be invasive at higher elevations of tropical environments
  
• Unarmed (no spines, thorns, or burrs)
  
• Palatable to browsing animals
  
• Ornamental
  
• Self-incompatible
  
• Vegetative spread may be limited to a few suckers
  
• Reaches maturity in 10+ years