Family: Zingiberaceae

Origin, Description & Uses
Curcuma alismatifolia, commonly known as Siam pearl or Siam tulip, is native to Cambodia, Laos, Thailand, and Vietnam. This tropical perennial produces striking, upright flower spikes with vibrant pink, purple, or white bracts above lush green foliage. Growing from rhizomes, it thrives in warm, humid environments and well-drained soil. Popular for ornamental gardens and cut flower arrangements, Siam tulip adds a tropical, colorful accent to landscapes, patios, and floral displays.

Risks & Threats
Curcuma alismatifolia is considered low risk in Hawai‘i. It is not known to be invasive and generally poses minimal threat to native ecosystems. However, like all non-native plants, monitoring for escape from gardens is recommended to ensure it does not establish in natural areas. For gardeners seeking vibrant tropical blooms with minimal ecological impact, Siam tulip is a safe and attractive choice.

High Risk Traits:

• Elevation range exceeds 1000 m, demonstrating environmental versatility
  
• Grows in tropical climates
  
• A geophyte capable of reproducing by rhizomes, and tubers.
  
• May also be propagated by seeds, if available
  
• Seeds have arils, and if produced, might be dispersed by birds or ants (vector unknown)
  
• May be able to regenerate from rhizomes

Low Risk Traits:

• No reports of invasiveness or naturalization
  
• Unarmed (no spines, thorns or burrs)
  
• No reports of toxicity
  
• Ornamental
  
• Self-incompatible
  
• Limited or absent seed production in cultivation. Limits potential for accidental dispersal