Family: Fabaceae
Origin, Description & Uses:
Virgilia divaricata, commonly known as keurboom or forest virgilia, is a fast-growing, small to medium-sized flowering tree native to the montane forests of South Africa. It is valued for its graceful form, smooth gray bark, and abundant clusters of fragrant, pale pink to lavender pea-like flowers that bloom over an extended season, attracting bees and other pollinators. As a member of the legume family, it can improve soil fertility through nitrogen fixation. Virgilia divaricata is widely planted as an ornamental tree in parks and gardens, where it provides light shade, seasonal color, and serves as a pioneer species for revegetation and erosion control.
Risks & Threats:
Virgilia divaricata is considered a low-risk species for Hawaiʻi. Although it produces viable seeds and may occasionally self-sow near cultivated trees, there is no evidence that it has become invasive or caused significant ecological impacts in Hawaiʻi or other tropical island ecosystems. Seedlings generally establish only in favorable disturbed sites and do not appear to spread aggressively into native habitats. As with any introduced plant, responsible planting and monitoring are encouraged, but current evidence indicates that this attractive ornamental tree poses little risk to Hawaiʻi’s natural environments when properly managed.
High Risk Traits:
- Grows in maritime, Mediterranean climates
- Reported to be naturalized and/or a weed but evidence is inconclusive
- From fire-prone ecosystem. May increase fire risk in introduced range.
- Tolerates many soil types
- Forms dense stands (following fires) in native range
- N-fixing (may alter soil chemistry)
- Reproduces by seeds
- Seeds dispersed by gravity, internally by primates, people and possibly by water
- Seeds form a persistent, long-lived seed bank (up to 230 years)
Low Risk Traits:
- Unarmed (no spines, thorns, or burrs)
- Non-toxic
- Ornamental
- Not reported to spread vegetatively
- Seeds with limited dispersal ability
