Family: Arecaceae
Origin, Description & Uses
Geonoma interrupta (chontilla, cortadera) is a small to medium-sized understory palm native to tropical regions of Central and South America, including countries such as Costa Rica, Panama, Colombia, Ecuador, and Peru. It typically grows in humid, shaded rainforest environments, where it forms slender stems topped with gracefully arching, finely divided fronds. This palm is valued for its elegant appearance and is sometimes cultivated as an ornamental in tropical gardens and shaded landscapes. In its native range, it may also be used locally for thatching, weaving, or other small-scale applications due to its flexible leaves.
Risks & Threats
Although Geonoma interrupta is not currently known to be naturalized in the Hawaiian Islands, it possesses traits that raise concern for tropical ecosystems. As a shade-tolerant palm adapted to forest understories, it has the potential to establish in native forests, where it could compete with indigenous plants for light, nutrients, and space. Its ability to thrive in moist, shaded environments similar to Hawaii’s native habitats increases the risk of spread if introduced. If it were to become established, it could alter forest structure and negatively impact native biodiversity. For these reasons, it is recommended to avoid planting this species and instead choose a low-risk or native alternative better suited for Hawaii’s ecosystems.
High Risk Traits:
- Shade tolerant – thrives in forest understory
- Vegetative reproduction – spreads via suckering
- Produces viable seed
- Intentional dispersal – sold as an ornamental
- Bird-dispersed – fleshy fruits
- Seeds survive gut passage – spread by frugivores
- Prolific seed production – abundant seedlings
Low Risk Traits:
- No naturalization or weed history
- No spines, thorns, or burrs
- Not wind-dispersed
- No accidental dispersal – unlikely as contaminant
