Family: Apocynaceae

High Risk Traits:

• Broad climate suitability (>5 hardiness zones, but primarily temperate)
  
• Possibly naturalized (unverified)
  
• Regarded as weedy in some circumstances
  
• Other Asclepias species are invasive
  
• Unpalatable to browsing and grazing animals
  
• Toxic to mammals and people
  
• Tolerates many soil types
  
• Reproduces by seeds and vegetatively by underground shoots
  
• Low levels of self-compatibility
  
• Reaches maturity in 2-3 years
  
• Seeds dispersed by wind and intentionally by people

Low Risk Traits:

• Unarmed (no spines, thorns, or burrs)
  
• Provides food for monarch butterfly larvae
  
• Generally occurs in high light environments (might not be able to invade areas with dense shade)
  
• Low reproductive output reported from native range