Family: Verbenaceae

Origin, Description & Uses
Phyla nodiflora (matchweed), also known as frogfruit, is a low-growing perennial herb native to tropical and subtropical regions around the world. It forms dense mats of creeping stems with small oval leaves and tiny white to pale purple flowers clustered into button-like heads. Because it spreads quickly and tolerates heat, foot traffic, and poor soils, matchweed is sometimes used as a groundcover in lawns, gardens, pathways, and erosion control plantings. It can also provide nectar for pollinators and is occasionally valued in traditional medicine in some regions.

Risks & Threats
Phyla nodiflora is naturalized on several Hawaiian Islands, including Oʻahu, Molokaʻi, Maui, and Kuaihelani (Midway Atoll), and is potentially naturalizing on Kauaʻi and Hawaiʻi Island. This species possesses traits that are cause for concern, including rapid vegetative spread, tolerance of disturbance, and the ability to form dense groundcover mats that can outcompete low-growing native plants. Matchweed can invade lawns, roadsides, wetlands, coastal areas, and other disturbed habitats, where it may alter plant communities and reduce native biodiversity. Because tropical island ecosystems are especially vulnerable to aggressive spreading plants, continued expansion of this species could detrimentally impact sensitive habitats. When possible, Plant Pono recommends choosing low risk or native groundcover alternatives better suited for Hawaiʻi’s unique ecosystems.

High Risk Traits:

• Naturalized outside native range
  
• Weed of gardens, amenity areas, and agriculture (principal weed in India)
  
• Tolerates wide range of soil conditions
  
• Shade tolerant
  
• Reproduces vegetatively (creeping, roots at nodes)
  
• Produces viable seed
  
• Dispersed unintentionally (lawn clippings) and intentionally (cultivated as ground cover)
  
• Water-dispersed (flooding fragments re-establish)
  
• Tolerates foot traffic and mutilation

Low Risk Traits:

• No allelopathy, parasitism, or toxicity reported
  
• Palatable to grazing animals (valuable forage)
  
• Fire resistant
  
• No prolific seed production or persistent seed bank
  
• Not dispersed by birds, animals, or gut passage