Family: Asteraceae

High Risk Traits:

• Broad climate suitability (5 hardiness zones)
  
• Widely naturalized
  
• An common lawn weed
  
• Possibly allelopathic
  
• Sap can cause dermatitis
  
• Tolerates many soil types
  
• Shade-tolerant
  
• Self-compatible
  
• Spreads vegetatively
  
• Starts to spread vegetatively after 2 years
  
• Seeds easily dispersed by wind, water, sticking to animals, vehicles and people and as a seed contaminant
  
• Forms a persistent seed bank

Low Risk Traits:

• Grows in temperate climates and may be restricted to higher elevations in tropical island ecosystems
  
• Palatable to grazing animals
  
• Non-toxic
  
• Ornamental bedding plant
  
• Can be controlled mechanically and with herbicides