Family: Oleaceae
Origin, Description & Uses:
Jasminum polyanthum, commonly known as winter jasmine or pink jasmine, is a fast-growing, vining shrub native to south-central China to Myanmar. It is widely cultivated in tropical and subtropical regions, including Hawaiʻi, for its fragrant, star-shaped white flowers that emerge from pink buds, typically blooming in late winter to early spring. This species is commonly used as an ornamental plant to cover trellises, fences, and walls, and is prized for its vigorous growth and attractive, cascading form. It can also be grown in containers or used as a dense groundcover in suitable climates.
Risks & Threats:
In Hawaiʻi, Jasminum polyanthum is naturalized and has shown signs of spreading beyond cultivation, particularly on Kauaʻi and Hawaiʻi Island. Its rapid growth and climbing habit allow it to overtake and smother surrounding vegetation, including native plants, which can lead to reduced biodiversity and altered ecosystem structure. These traits are cause for concern, as this species has the potential to detrimentally impact tropical island ecosystems. Because of its invasive tendencies, it is recommended to avoid planting this species and instead choose a low-risk or native alternative for landscaping.
High Risk Traits:
- Naturalized outside native range (New Zealand, Hawaii)
- Environmental weed: smothers vegetation, blocks light, can bring down trees
- Congeneric weeds exist (J. dichotomum, J. fluminense)
- Flowers are highly allergenic
- Climbing, smothering growth habit
- Reproduces vegetatively (layering, suckering)
- Intentionally spread by people (commercial houseplant)
- Unintentionally spread via garden dumping
- Bird-dispersed berries
- Seeds survive gut passage
Low Risk Traits:
- No spines, thorns, or burrs
- Non-toxic to animals
- Not an agricultural weed
- Self-incompatible
- Seeds rarely produced in many regions
- No wind or water dispersal adaptation
- No external attachment adaptation
- Low seed production
