Family: Pinaceae

Origin, Description & Uses
Pinus caribaea is a fast-growing conifer native to the Caribbean region, including southeastern Mexico, Central America, the Bahamas, and western Cuba. It is a tall pine species that develops straight trunks and a relatively open canopy, often reaching large sizes in warm lowland tropical and subtropical environments. Caribbean pine has been widely introduced in forestry and plantation systems for timber and pulpwood production, as well as for windbreaks and erosion control. Its rapid growth and ability to tolerate poor soils have made it a popular species in managed landscapes outside its native range.

Risks & Threats
In Hawaiʻi, this species is naturalized and possesses traits that are cause for concern, including prolific seed production, environmental tolerance, and the ability to establish and persist in disturbed areas. These characteristics increase its potential to spread beyond planted sites and compete with native vegetation, potentially altering habitat structure and ecosystem processes. If expansion continues, it could detrimentally impact tropical island ecosystems by contributing to shifts in plant community composition and reducing native biodiversity. Because of these risks, choosing low-risk or native alternatives is recommended whenever such options are available.

High Risk Traits:

• Elevation range exceeds 1000 m, demonstrating environmental versatility
  
• Thrives in tropical climates
  
• Naturalized on Maui (Hawaiian Islands), and elsewhere
  
• An environmental weed that competes with native species
  
• Other pine species are invasive
  
• Allelopathic
  
• Tolerates many soil types
  
• Forms dense, monotypic stands
  
• Reproduces by seeds
  
• Hybridizes with P. oocarpa
  
• Capable of self-pollination
  
• Seeds dispersed by wind, sometimes by birds, rodents and intentionally by people
  
• Capable of prolific seed production
  
• Seeds may remain viable in soil for up to 3 years
  
• Tolerates fire

Low Risk Traits:

• Unarmed (no spines, thorns, or burrs)
  
• Planted as a timber tree, windbreak, and ornamental
  
• Not reported to spread vegetatively
  
• Herbicides may provide effective control