Family: Elaeocarpaceae
Origin, Description & Uses:
Elaeocarpus hainanensis, commonly known as Hainan elaeocarpus, is a small evergreen tree native to southern China and parts of Southeast Asia, including Hainan, Guangdong, Guangxi, Yunnan, Myanmar, Thailand, and Vietnam. It typically grows to about 15–20 feet (5–6 m) tall and has glossy green leaves that often cluster near the ends of branches. The tree produces small, fragrant white flowers in hanging clusters, followed by elongated, drupe-like fruits. It grows naturally in warm, humid environments such as forests and along streams. Because of its attractive foliage and delicate flowers, it is sometimes cultivated as an ornamental tree in gardens and landscapes and may also be used in containers or bonsai.
Risks & Threats:
Although Elaeocarpus hainanensis is not currently known to be naturalized in the Hawaiian Islands, it possesses traits that could be cause for concern. The species is adapted to tropical and subtropical climates similar to those found in Hawaiʻi and may be capable of reproducing and establishing in suitable environments. Its ability to grow in moist forest conditions and cultivated landscapes suggests it could potentially spread beyond plantings if introduced. However, information about its behavior outside its native range is limited. Further evaluation is needed to determine whether this species could spread or negatively impact Hawaiʻi’s native ecosystems.
High Risk Traits:
- Suited to tropical climates
- Young plants are shade tolerant
- Produces viable seeds
- Seeds adapted for bird dispersal
- Seeds survive gut passage
- Actively cultivated by people
- Potential for mammal dispersal (related species)
- Congeneric weed exists
Low Risk Traits:
- No evidence of naturalization or weediness anywhere
- Narrow climate suitability (environmental versatility)
- Lacks spines, toxicity, or fire hazard traits
- No vegetative reproduction
- Large fruits—unlikely for wind or contaminant dispersal
- Low seed production (large seeds, few per fruit)
