Family: Myrtaceae

Eucalyptus largiflorens (black box, river box) is a tree endemic to Australia. Its uses include erosion control, being an ornamental, and formerly as a timber tree. Indigenous Australians used components of the tree to tan hides, poison fish, and build shelter. They also would harvest water from the roots and eat the seeds after preparing them. There are some unverified reports of naturalization but none on any Hawaiian Islands to date. Other eucalyptus species are invasive. Some qualities of this plant are concerning, such as its ability to withstand many soil types and to spread by root suckers. There are no reports of invasiveness of Eucalyptus largiflorens, however there is only limited evidence of its introduction beyond its native range.

High Risk Traits:

• Unverified reports of naturalization (but no evidence in the Hawaiian Islands)
  
• Other Eucalyptus species are invasive.
  
• Tolerates many soil types
  
• Forms pure stands in native range
  
• Reproduces by wind and water-dispersed seeds.
  
• Able to produce root suckers
  
• Coppices and resprouts after cutting

Low Risk Traits:

• No reports of invasiveness, but limited evidence of introduction outside native range
  
• Non-toxic
  
• Cultivated in full sun (dense shade may limit ability to spread)
  
• Unarmed (no spines, thorns, or burrs)