Family: Myrtaceae
Origin, Description & Uses
Corymbia torelliana (blood-leaf gum) is a tree native to Queensland, Australia. It is known for its striking red-tinged leaves and clusters of creamy-white flowers that produce a sticky resin. The tree typically grows to medium height and has a smooth, mottled bark. While it is sometimes cultivated as an ornamental for its dramatic foliage and attractive flowers, it is not widely used for timber or large-scale commercial purposes. Its resin has also been noted for attracting certain wildlife, including bees.
Risks & Threats
Although Corymbia torelliana is not currently naturalized in Hawaii, it possesses traits that are cause for concern. The species produces a copious amount of resin that can aid in seed dispersal, potentially allowing it to spread beyond cultivated areas. Its adaptability and vigorous growth could enable it to compete with native plants if introduced. Further evaluation is needed to determine whether this species could impact Hawaii’s ecosystems, and caution is recommended before planting, especially near natural areas.
High Risk Traits:
- Environmental versatility: Tolerates a wide range of climates and soil conditions.
- History of introductions: Widely planted across tropical regions.
- Congeneric weed: Other Eucalyptus species are recognized weeds.
- Shade tolerant: Can establish in closed-canopy forests.
- Prolific reproduction: Produces copious viable seeds.
- Hybridization: Capable of natural hybridization with other species.
- Multiple dispersal vectors: Seeds dispersed by wind, animals (bees), and unintentional human transport; also intentionally planted.
Low Risk Traits:
- No naturalization: Has not become naturalized despite extensive cultivation.
- No documented weed status: Not formally classified as an environmental or agricultural weed.
- Non-toxic: No toxicity to humans or animals.
- No vegetative spread: Does not reproduce by fragmentation.
- No seed bank persistence: No evidence of long-term soil seed banks.
- Fire intolerance: Likely killed by fire; no resprouting ability.
