Family: Polygonaceae

Origin, Description & Uses
Fagopyrum esculentum, commonly known as buckwheat, is a fast-growing annual plant native to Central and East Asia. Despite its name, it is not a true wheat but a broadleaf plant related to rhubarb. Buckwheat typically grows 1–3 feet tall, with heart-shaped leaves and clusters of small white to pink flowers that attract pollinators. It is widely cultivated for its nutritious seeds, which are used as a gluten-free grain alternative in foods such as noodles, pancakes, and porridge. Buckwheat is also valued as a cover crop, helping to improve soil health, suppress weeds, and prevent erosion.

Risks & Threats
Buckwheat is considered low risk and is not known to naturalize or spread aggressively in Hawaii or similar tropical environments. It has a short life cycle and generally requires cultivation to persist, limiting its ability to establish in unmanaged ecosystems. While it may reseed under favorable conditions, it does not typically form dense, invasive populations or outcompete native vegetation. Overall, Fagopyrum esculentum poses minimal ecological threat and can be a beneficial crop when managed appropriately.

High Risk Traits:

• Naturalized in regions outside its native range (e.g., North America, Australia)
  
• Has a congeneric weed (Fagopyrum tataricum) that is a serious agricultural pest
  
• Exhibits allelopathic properties that can inhibit neighboring plant growth
  
• Host for numerous recognized pests and pathogens
  
• Tolerates a wide range of soil conditions (acidic to alkaline, sandy to clay)
  
• Propagules likely dispersed unintentionally (e.g., via farm equipment)
  
• Propagules dispersed intentionally by people (cultivated as a crop)

Low Risk Traits:

• No evidence of significant weed impacts in agricultural, horticultural, or environmental settings
  
• Not a shade-tolerant plant
  
• Does not produce spines, thorns, or burrs
  
• Self-incompatible (requires outcrossing)
  
• No vegetative reproduction (reproduces only by seed)
  
• Not adapted for dispersal by wind, water, birds, or external animal attachment
  
• Low seed production due to high seed abortion rates
  
• Can be controlled by herbicides (e.g., 2,4-D, MCPA)