Family: Fabaceae

Origin, Description & Uses
Erythrina × bidwillii, commonly known as Bidwill’s coral tree or shrub coral tree, is a hybrid ornamental plant derived from species native to tropical regions of the Americas. It is a small tree or large shrub known for its striking, bright red, tubular flowers that bloom over long periods and attract pollinators such as birds. This deciduous plant typically has a somewhat open, spreading form with thorny stems and compound leaves. It is widely cultivated in warm climates as a decorative landscape plant, valued for its vivid floral display, use as a hedge or specimen plant, and ability to add color to gardens with minimal care once established.

Risks & Threats
This species is considered low risk and is not known to naturalize or spread aggressively in Hawaiʻi. As a sterile or low-seed-producing hybrid, it has limited potential for reproduction and invasion. While it may occasionally produce seedlings under favorable conditions, there is no evidence that it forms persistent populations or disrupts native ecosystems. Standard garden management, such as monitoring for unwanted spread and proper disposal of plant material, is sufficient. Overall, Erythrina × bidwillii is regarded as a safe ornamental choice for landscaping when used responsibly.

High Risk Traits:

• Grows in tropical climates
  
• Other Erythrina species have become invasive
  
• Some spines or thorns present on tree
  
• Unpalatable (deer resistant)
  
• Reported to be toxic to animals and people
  
• Tolerates many soil types
  
• N-fixing (modifies soil chemistry)
  
• Intentionally spread by people
  
• May resprout after cutting

Low Risk Traits:

• No reports of invasiveness or naturalization outside native range
  
• Prefers full sun (dense shade may prevent any potential for spread into intact forests)
  
• A sterile hybrid unlikely to spread without human assistance
  
• Not reported to spread vegetatively