Family: Convolvulaceae

Origin, Description & Uses
Poranopsis paniculata is a large woody climbing vine native to the Indian Subcontinent through Myanmar. It is valued in some tropical regions as an ornamental because of its vigorous growth and showy clusters of small pale flowers. This fast-growing vine can climb high into surrounding vegetation, including trees over 50 feet tall, where it forms dense masses of foliage. In Hawaiʻi, Poranopsis paniculata has been present since at least 1936 but has never become widely cultivated. Despite its relatively limited use, it has escaped from original plantings and has been documented naturalized on Kauaʻi, Maui, and Hawaiʻi Island.

Risks & Threats
Poranopsis paniculata is naturalized in Hawaiʻi and possesses traits that are cause for concern in tropical island ecosystems. The vine grows aggressively and can smother host trees and surrounding vegetation, potentially reducing light availability and displacing native plants. It also spreads readily through vegetative fragments, especially from stem nodes, making it difficult to control once established. Although seeds have not yet been found in Hawaiʻi and it is unclear whether suitable pollinators are present, the species has still demonstrated the ability to spread beyond cultivation. Because of these invasive characteristics, this species could detrimentally impact tropical island ecosystems if allowed to expand further. Where possible, Plant Pono recommends choosing low risk or native alternatives instead of planting Poranopsis paniculata. In areas where the vine is already present, landowners are encouraged to manage existing plants carefully and avoid planting it in new locations to help minimize further spread and ecological impacts.

Description and Dispersal:

• Large woody vine
  
• Heart-shaped leaves with velvety white hair on the underside
  
• Slender tubular white flowers have a sweet scent
  
• Dense masses of abundant flowers

High Risk Traits:

• Elevation range exceeds 1000 m, demonstrating environmental versatility
  
• Thrives in tropical climates
  
• Possibly naturalizing on Kauai, and naturalized on Maui and Hawaii, Hawaiian Islands. Also naturalized in other tropical locations
  
• Regarded as a weed of fruit tree groves (no impacts reported)
  
• Climbing and smothering growth habit
  
• Tolerates many soil types
  
• Reproduces by seeds and vegetatively
  
• Seeds dispersed by gravity and intentionally by people

Low Risk Traits:

• Unarmed (no spines, thorns or burrs)
  
• Non-toxic
  
• Ornamental
  
• Seed production may be limited or absent in the Hawaiian Islands
  
• Limited or absent seed production in the Hawaiian Islands reduces risk of accidental dispersal