Family: Bignoniaceae

Origin, Description & Uses:
Jacaranda mimosifolia, commonly known as jacaranda, is a striking ornamental tree native to South America, particularly regions of Argentina and Bolivia. It is widely appreciated for its airy, fern-like foliage and its spectacular display of lavender-blue, trumpet-shaped flowers that bloom in abundance, often carpeting the ground beneath the tree. Jacaranda is commonly planted in tropical and subtropical regions, including Hawaiʻi, as a shade and street tree, and for its exceptional aesthetic value in landscapes, parks, and gardens.

Risks & Threats:
Jacaranda is naturalized in parts of Hawaiʻi but is generally considered a low-risk species. While it can reproduce by seed and occasionally spread beyond cultivation, it typically does not form dense stands or aggressively outcompete native vegetation. However, seedlings may establish in disturbed areas, and the tree’s prolific flowering and leaf drop can create maintenance concerns in urban settings. Overall, jacaranda poses minimal ecological threat compared to more invasive species, but responsible planting and monitoring are encouraged to ensure it remains a manageable component of Hawaiʻi’s landscape.

High Risk Traits:

• Naturalized in Hawaii, South Africa, Australia
  
• Invades ~1.8 million ha in South Africa
  
• Broad climate tolerance (USDA zones 9–11, to 2400m)
  
• Widely introduced as ornamental
  
• Self-compatible
  
• Wind-dispersed seeds
  
• Tolerates coppicing

Low Risk Traits:

• Not an agricultural weed
  
• No spines, thorns, or burrs
  
• Not allelopathic, parasitic, or toxic
  
• Requires full sun (not shade-tolerant)
  
• No vegetative spread
  
• No persistent seed bank