Family: Fabaceae

High Risk Traits:

• Thrives in tropical climates
  
• Broad climate suitability
  
• Elevation range exceeds 1000 m
  
• Naturalized in a number of locations
  
• A potential environmental weed
  
• A number of Senna species have become invasive
  
• Allelopathic properties
  
• Seeds, pods, and foliage are toxic to pigs and non-ruminants
  
• Sawdust may cause some irritation to the nose, throat and eyes
  
• Tolerates many soil types
  
• Reported to form dense thickets in Africa
  
• Spreads by seeds (human, animal and water mediated)
  
• Viable seeds pass through guts of animals
  
• Forms a persistent seed bank
  
• Coppices vigorously

Low Risk Traits:

• Despite history of naturalization and invasiveness, negative impacts have not been extensively documented to date
  
• Unarmed (no spines, thorns, or burrs)
  
• Palatable fodder plant to cattle and other ruminants
  
• High light demander (may not spread into understory of intact forests)
  
• Not a nitrogen fixing tree
  
• Valued as a shade tree
  
• Pods and seeds are relatively large, which could limit long-distance dispersal
  
• Herbicides may provide effective control