Family: Melastomatceae

Origin, Description & Uses
Medinilla heterophylla, commonly known as medinilla, is a tropical flowering shrub native to Fiji. It is valued as an ornamental plant for its attractive foliage, delicate pink to purple flowers, and sprawling growth habit that makes it suitable for tropical gardens and shaded landscapes. Like other members of the melastome family, it thrives in warm, humid environments and can spread readily in favorable conditions. In Hawaiʻi, this species has become naturalized on Oʻahu, where it is able to persist outside of cultivation.

Risks & Threats
Medinilla heterophylla is considered a high risk species because it possesses traits associated with invasive behavior in tropical environments. Its ability to establish in moist forests and disturbed habitats raises concern that it could spread into native ecosystems and compete with local vegetation. As a naturalized species in Hawaiʻi, it demonstrates the capacity to reproduce and maintain populations without human assistance, which could detrimentally impact tropical island ecosystems over time. Because of these concerns, planting should be approached cautiously, and low risk or native alternatives are recommended whenever suitable options are available.

High Risk Traits:

• Naturalized beyond native range (Oahu)
  
• Congeneric weed (M. venosa is noxious in Hawaii)
  
• Broad climate suitability (elevation range 50–1120 m)
  
• Climbing or smothering growth habit (liana)
  
• Produces viable seed
  
• Propagules dispersed intentionally by people (ornamental)
  
• Propagules bird-dispersed (berries)
  
• Propagules survive gut passage
  
• Prolific seed production (numerous seeds per berry)

Low Risk Traits:

• No evidence of agricultural, forestry, or environmental weed status
  
• No spines, thorns, or burrs
  
• Not toxic to animals
  
• Unlikely to create fire hazard (dense forest habitat)
  
• Not adapted for wind dispersal
  
• No external animal dispersal mechanism