Family: Myrtaceae

Hypocalymma robustum is a shrub native to Western Austraila. It is commonly cultivated as an ornamental garden plant. It has been used in traditional medicine for skin diseases, wounds and ulcers. This plant has not been documented as naturalized in any Hawaiian Islands to date.

High Risk Traits:

• Tolerates many soil types
  
• Reproduces by seeds
  
• Hybridizes with other species
  
• Seeds dispersed by gravity and intentionally by people
  
• Resprouts from a lignotuber after fire, and tolerates pruning

Low Risk Traits:

• No reports of invasiveness or naturalization, but limited evidence of widespread introduction outside native range
  
• Unarmed (no spines, thorns, or burrs)
  
• Non-toxic
  
• Grows in full sun to light shade (dense shade may limit ability to spread into forests)
  
• Reported to be strongly outcrossing (requires cross pollination with another plant)
  
• Not reported to spread vegetatively
  
• Seeds lack any obvious means of long-distance dispersal