Family: Zingiberaceae

Alpinia carolinensis is a striking member of the ginger family (Zingiberaceae), native to the Caroline Islands in Micronesia. This perennial herb produces tall leafy stems with broad, glossy foliage and showy inflorescences that add ornamental appeal to gardens and landscapes. Like many gingers, it thrives in tropical and subtropical climates, preferring moist, shaded environments where it can develop dense clumps over time. Its attractive foliage and flowers make it a desirable plant for collectors and those seeking unique ornamentals.

In Hawaiʻi, Alpinia carolinensis is only found in cultivation and has not been observed naturalizing in the wild. While it is not currently considered a threat to native ecosystems, continued observation is important since some related ginger species have proven invasive in the islands. Gardeners who cultivate this species should take care to dispose of green waste responsibly and avoid planting it near natural areas to ensure it remains a safe and non-invasive ornamental choice.

High Risk Traits:

• Thrives in tropical climates
  
• Other Alpinia species have become invasive
  
• Shade tolerant (able to grow in intact forest understory)
  
• Reproduces by seeds and vegetatively by rhizomes
  
• Seeds dispersed by birds, fruit bats, and intentionally planted by people (limited ornamental use)
  
• Limited information reduces accuracy of risk prediction

Low Risk Traits:

• No reports of invasiveness or naturalization, but no evidence of widespread introduction outside native range
  
• Unarmed (no spines, thorns, or burrs)
  
• Non-toxic