Family: Amaranthaceae

Origin, Description & Uses:
Iresine diffusa f. herbstii, commonly known as beefsteak plant, bloodleaf, or chicken gizzard, is native to Peru in South America. It is widely grown as an ornamental for its striking, colorful foliage, which ranges from deep red and purple to bright magenta, often highlighted by vivid veins. This low-growing, bushy plant is commonly used in garden beds, borders, and containers to provide bold contrast and year-round color in tropical landscapes. It thrives in warm, humid conditions and performs well in full sun to partial shade. Gardeners value it for its fast growth and its ability to be easily shaped through pruning.

Risks & Threats:
This species is considered low risk and is not known to pose significant environmental threats in Hawaiʻi. While it may spread locally through vegetative cuttings if garden waste is not properly managed, it does not typically behave aggressively or invade natural areas. With simple care practices—such as proper disposal of plant material and regular maintenance—Iresine diffusa f. herbstii can be grown responsibly. It remains a safe and attractive ornamental option, especially when compared to higher-risk invasive species.

High Risk Traits:

• Broad climate suitability (USDA zones 10b–12, 150–2500 m)
  
• Native to tropics/subtropics (Brazil)
  
• Widely introduced outside native range
  
• Congeneric weed (host for Meloidogyne hapla)
  
• Host for severe pathogen (Alternaria alternantherae)
  
• Shade tolerant
  
• Produces viable seed
  
• Reproduces vegetatively (stem cuttings)
  
• Tolerates mutilation (responds well to cutting/pinching)

Low Risk Traits:

• No evidence of naturalization or weediness
  
• No spines, thorns, or burrs
  
• Not allelopathic or parasitic
  
• Non-toxic to humans and animals
  
• No fire hazard
  
• Narrow soil tolerance (loamy/sandy, well-drained)
  
• Dioecious (limits self-pollination)
  
• Seeds infrequently formed in cultivation
  
• No evidence of seed bank persistence
  
• No wind, water, bird, or external animal dispersal
  
• Unlikely to be dispersed unintentionally