Family: Apocynaceae
Origin, Description & Uses
Willughbeia angustifolia is a tropical climbing plant native to the Nicobar Islands, western Malesia, and Buru in the Maluku Islands. Belonging to the dogbane family (Apocynaceae), it is a vigorous woody vine or liana with glossy green leaves, fragrant flowers, and round to oval fruits that are edible when ripe. In its native range, the fruit is occasionally gathered for local consumption, and the plant has also been used in traditional medicine. Its attractive foliage and tropical appearance make it of interest to collectors and botanical gardens, particularly in warm, humid climates.
Risks & Threats
Willughbeia angustifolia is considered a low-risk species for Hawaiʻi. There are no reports of it becoming naturalized in the Hawaiian Islands or behaving invasively elsewhere, and there is little evidence that it spreads aggressively beyond cultivation. As with any introduced plant, it is good practice to monitor for unexpected spread and prevent unwanted seedlings from establishing in nearby natural areas. Based on current knowledge, however, this species poses little threat to Hawaiʻi’s native ecosystems and can be considered an appropriate choice where a non-invasive tropical climber is desired.
High Risk Traits:
- Thrives in tropical climates
- Climbing, and potentially smothering, growth habit
- Reproduces by seed
- Seeds dispersed by mammals and intentionally by people
- Seeds dispersed by birds and intentionally by people
- Limited ecological information reduces accuracy of risk prediction
Low Risk Traits:
- No reports of invasiveness or naturalization, but no evidence of widespread introduction outside native range
- Unarmed (no spines, thorns or burrs)
- Edible fruit
- Medicinal uses
- Fruit relatively large and unlikely to be accidentally dispersed
