Family: Oleaceae

Origin, Description & Uses:
Jasminum multiflorum, commonly known as star jasmine or downy jasmine, is native to South Asia, including India and Sri Lanka, and has been widely introduced to tropical and subtropical regions around the world. It is a fast-growing, evergreen shrub with arching branches and soft, slightly hairy leaves. The plant is especially valued for its clusters of small, white, star-shaped flowers that bloom abundantly and add ornamental appeal, though they are generally not fragrant. In Hawaiʻi, star jasmine is often used in landscaping as a hedge, groundcover, or informal screen due to its dense growth and ability to tolerate pruning.

Risks & Threats:
In Hawaiʻi, Jasminum multiflorum is naturalized but is currently considered a low-risk species. While it can spread beyond cultivation, particularly in disturbed areas or along roadsides, it has not been widely observed to form dense infestations or significantly disrupt native ecosystems. However, its vigorous growth and ability to establish in a range of conditions suggest it should still be monitored. Responsible planting and maintenance—such as preventing escape into natural areas—can help minimize any potential for future spread or ecological impact.

High Risk Traits:

• Naturalized in Hawai'i, Florida and Jamaica (escaped cultivation)
  
• Congeners (J. fluminense, etc.) are weeds
  
• Broad climate suitability (USDA zones 6–11)
  
• Shade tolerant
  
• Tolerates various soils
  
• Climbing/smothering growth habit
  
• Widely cultivated (intentional dispersal)
  
• Host for a pest (Hymenia fascialis)

Low Risk Traits:

• No evidence as agricultural, forestry, or environmental weed
  
• No spines, thorns, or burrs
  
• No toxicity, allelopathy, or parasitism
  
• Frequent sterility; seeds infrequently produced
  
• No vegetative or water/wind/animal dispersal
  
• Controllable with herbicides