Family: Poaceae

Origin, Description & Uses:
Eleusine coracana, commonly known as finger millet, is an annual cereal grass native to East Africa that has been widely cultivated for thousands of years across Africa and South Asia. The plant typically grows 1–5 feet tall and is recognized by its distinctive seed heads, which spread out like the fingers of a hand. Finger millet is an important food crop in many regions, valued for its highly nutritious grain that is rich in calcium, fiber, and essential amino acids. The grain is commonly ground into flour to make porridges, flatbreads, and fermented foods, and it can also be used in beverages. In addition to its role in human diets, finger millet is sometimes grown as livestock feed and as a resilient crop in areas with poor soils or drought conditions.

Risks & Threats:
Although finger millet is not known to be naturalized in Hawaiʻi, it possesses traits that raise some concerns. As a hardy grass that produces abundant seeds and tolerates a wide range of environmental conditions, it could potentially establish outside of cultivation if introduced more widely. Species in the grass family are often capable of spreading in disturbed habitats such as roadsides, fields, and pastures. While finger millet is primarily grown as a crop, further evaluation is needed to determine whether it could spread or impact native ecosystems or agricultural areas in Hawaiʻi. Careful monitoring and responsible cultivation are recommended until its potential risks are better understood.

High Risk Traits:

• Agricultural weed (strong root system, hard to control)
  
• Congeners (E. indica, E. africana) are weedy
  
• Broad climate suitability (USDA Zone 9, wide elevation)
  
• Tolerates wide soil conditions
  
• Self-compatible
  
• High seed output
  
• Hybridizes naturally with weedy relatives
  
• Annual (1 year to maturity)
  
• Host for crop pathogens (Piricularia oryzae)

Low Risk Traits:

• No environmental weed evidence
  
• Palatable to livestock
  
• Non-toxic to animals or humans
  
• No spines/thorns/burrs
  
• Not allelopathic or parasitic
  
• Not shade tolerant
  
• No vegetative reproduction
  
• No dispersal adaptations (wind, water, external animals)