Family: Loganiaceae
Origin, Description & Uses
Strychnos spinosa is native to tropical and southern Africa as well as islands of the western Indian Ocean. It typically grows as a small to medium-sized, thorny tree or shrub with a rounded crown and distinctive spiny branches. The plant produces hard-shelled, round fruits that contain a yellow-orange, aromatic pulp. In its native range, the fruit is widely eaten fresh or used in drinks and preserves, and the species is also valued in traditional agroforestry systems. Wildlife, especially birds and mammals, also feed on the fruit, helping to support local ecosystems.
Risks & Threats
This species is not known to be naturalized or invasive in Hawaiʻi and is generally considered low risk. Its thorny branches and large, hard fruits may be a minor physical nuisance if planted near walkways or high-traffic areas, but it does not exhibit aggressive spreading behavior or weedy traits in similar climates. As with any introduced fruiting tree, monitoring is still recommended to ensure it does not escape cultivation or become established in sensitive habitats. Overall, it appears to have low potential for ecological impact when grown responsibly in managed landscapes.
High Risk Traits:
- Elevation range exceeds 1000 m, demonstrating environmental versatility
- Thrives in tropical climates
- Naturalized in Florida
- Thorny tree
- Seeds and unripe fruit are toxic
- Tolerates some shade
- Reproduces by seeds and vegetatively by root suckers
- Seeds dispersed by large mammals and intentionally by people (possibly by pigs in Hawaiian Islands)
- Seeds orthodox, may persist in the soil
- Able to coppice and resprout after cutting
Low Risk Traits:
- Palatable to livestock and grazing animals
- Edible and medicinal uses
- Reaches maturity in 5-10 years from seed
- Large fruit and seeds unlikely to be accidentally dispersed
