Family: Myrtaceae
Origin, Description & Uses
Pimenta racemosa (bay rum tree, West Indian bay tree) is native to the Caribbean region and northern South America, including Venezuela. It is an evergreen, aromatic tree in the myrtle family that typically grows in warm tropical climates. The tree can reach medium height and produces glossy, leathery leaves, small white flowers, and dark oval fruits. Its foliage has a strong, pleasant fragrance when crushed. The leaves, bark, and fruit are widely used for their essential oils, which are distilled into the traditional “bay rum” cologne and also used in soaps, perfumes, herbal teas, and flavoring for foods and beverages.
Risks & Threats
Although valued for its fragrance and traditional uses, bay rum tree is widely introduced beyond its native range and is now cultivated throughout many tropical regions, including Hawaiʻi, where it is naturalized on Oʻahu. In some environments it can spread beyond cultivation, with bird-dispersed seeds contributing to establishment in natural areas. Its adaptability to warm climates and ability to reproduce in disturbed habitats increases its potential to become locally invasive. This species is naturalized in Hawaiʻi and possesses traits that are cause for concern, and it could detrimentally impact tropical island ecosystems by competing with native vegetation. Ongoing evaluation is warranted, and when available, choosing a low-risk or native alternative is recommended for planting in Hawaiʻi.
High Risk Traits:
- Naturalized beyond native range
- Environmental weed (Bahamas, Cook Islands, Hawaii)
- Congeneric weed (P. dioica invasive)
- Tolerates wide range of soils
- Host for pests/pathogens (rust, canker)
- Produces viable seed
- Intentionally dispersed by people
- Bird-dispersed seeds
- Seeds survive gut passage
- Tolerates coppicing (regrows from stumps)
Low Risk Traits:
- No agricultural/forestry weed
- No spines, thorns, or burrs
- No vegetative fragmentation
- Not wind- or water-dispersed
- Low seed production
