Family: Moringaceae

Origin, Description & Uses
Moringa oleifera, commonly known as horseradish tree, drumstick tree, or kalamungay (malunggay), is native to northeastern Pakistan and northwestern India. This fast-growing small tree is valued for its feathery foliage, fragrant white flowers, and long slender seed pods. Nearly every part of the plant is used—its leaves, pods, flowers, and seeds are important food and traditional medicine sources in many tropical regions. In Hawai‘i, it was first introduced in the 1800s by Dr. William Hillebrand, and later became widely established through seeds brought by Filipino immigrants in the early 1900s. Today, moringa is commonly grown in home gardens for food, shade, nutrition, and ornamental value.

Risks & Threats
Moringa oleifera is naturalized on O‘ahu and is potentially naturalizing on Kaua‘i, but it is generally considered a low-risk species in Hawai‘i. Although it can spread from cultivation into disturbed areas, it has not demonstrated widespread invasive behavior or major impacts to native ecosystems. The tree is typically associated with gardens, roadsides, and dry lowland habitats rather than intact native forests. As with many introduced plants, responsible planting and monitoring are recommended to help prevent unwanted spread into sensitive natural areas.

High Risk Traits:

• Naturalized beyond native range (Kaua'i: Potentially naturalizing; O'ahu: Naturalized)
  
• Broad climate suitability (tropical/subtropical to warm temperate)
  
• Tolerates a wide range of soil conditions (including pH up to 9)
  
• Nitrogen-fixing woody plant
  
• Produces viable seed
  
• Reproduces vegetatively by cuttings
  
• Fast generative time (fruits within 6–12 months)
  
• Propagules dispersed intentionally by people
  
• Propagules adapted to wind dispersal
  
• Tolerates repeated pruning/mutilation

Low Risk Traits:

• Not reported as a pest, weed, or invasive species
  
• No spines, thorns, or burrs
  
• Palatable and non-toxic to grazing animals
  
• Not toxic to humans (leaves, flowers, fruits, seeds, roots are edible)
  
• Not shade tolerant (requires open areas)
  
• Not dispersed unintentionally, as a produce contaminant, by birds, or through gut passage
  
• No persistent seed bank (seed viability declines rapidly within 1 year)