Family: Acanthaceae

Origin, Description & Uses:
Hypoestes phyllostachya, commonly known as polka dot plant or freckle face, is a small, colorful ornamental native to Madagascar. It is widely cultivated for its attractive foliage, which features green leaves speckled with pink, red, or white spots. This low-growing, herbaceous plant is popular in gardens, containers, and as a houseplant due to its vibrant appearance and ease of care. In tropical climates like Hawaiʻi, it can be grown outdoors year-round and is often used as a groundcover or accent plant in shaded landscapes.

Risks & Threats:
In Hawaiʻi, polka dot plant is considered potentially naturalizing and is already showing signs of spreading beyond cultivation. It reproduces readily by seed and vegetative growth, allowing it to establish in disturbed and shaded natural areas. This species is naturalized, possesses traits that are cause for concern, and could detrimentally impact tropical island ecosystems by forming dense patches that outcompete native understory plants. Its ability to thrive in humid, shaded environments increases the risk of invasion into forested habitats. Because of these concerns, it is recommended to choose a low-risk or native alternative for landscaping, especially near natural areas, to help protect Hawaiʻi’s unique ecosystems.

High Risk Traits:

• Widely naturalized
  
• Thrives in tropical climates
  
• Environmental weed in Australia
  
• Related species are invasive
  
• Shade-tolerant
  
• Tolerates many soil conditions (and potentially able to exploit many different habitat types)
  
• Forms monospecific stands
  
• Self-fertile
  
• Reaches maturity in 1 year
  
• Will regenerate from small pieces of stem
  
• Seeds spread by water, wind, humans, contaminated soil and garden refuse dumping."
  
• Will resprout after repeated cutting

Low Risk Traits:

• Unarmed (no spines, thorns or burrs)
  
• Non-toxic
  
• Landscaping and ornamental value