Family: Rubiaceae

High Risk Traits:

• Broad climate suitability
  
• Thrives in tropical climates
  
• Widely naturalized (including Hawaiian Islands of Kauai, Oahu, Maui and Molokai)
  
• A disturbance-adapted weed of lawns, gardens, and crops
  
• Other Richardia species are regarded as weeds
  
• Forms dense colonies that may exclude other vegetation
  
• Reproduces by seeds
  
• Annual, reaching maturity in one growing season
  
• Seeds dispersed by water, in soil, and possibly by other means
  
• Seeds form a persistent seed bank

Low Risk Traits:

• Unarmed (no spines, thorns, or burrs)
  
• Provides fodder for livestock and green manure
  
• May not thrived in shaded positions
  
• May be self-incompatible
  
• Herbicides reported to provide effective control