Family: Acanthaceae

Origin, Description & Uses
Strobilanthes glomerata is a flowering shrub native to the eastern Himalayas, ranging from Sikkim and southeastern Tibet to Assam. It is valued as an ornamental plant for its attractive foliage and dense clusters of colorful flowers, which can add seasonal interest to gardens and landscapes. Like other members of the Strobilanthes genus, it is adapted to moist, subtropical to temperate environments and is often grown in shaded or partially shaded settings. Its showy blooms and lush growth habit make it appealing for use in botanical collections, specialty gardens, and ornamental plantings.

Risks & Threats
Although Strobilanthes glomerata is not currently known to be naturalized in Hawaiʻi, it possesses traits that are cause for concern. Species in the Strobilanthes genus can produce abundant seeds, form dense stands, and thrive in humid environments similar to those found in parts of the Hawaiian Islands. These characteristics may increase the likelihood of escape from cultivation and potential spread into natural areas. Ongoing evaluation is needed to determine whether this species could impact Hawaiʻi’s ecosystems. Until more information is available, caution is recommended when planting and managing this species to help prevent unintended spread into native habitats.

High Risk Traits:

• Naturalized beyond native range (Jamaica, Java)
  
• Congeneric species are invasive weeds
  
• Tolerates broad climate suitability (elevations 300-1700 m)
  
• Grows in tropical/subtropical climates
  
• Shade tolerant
  
• Tolerates a wide range of soil conditions (including limestone)
  
• Forms dense thickets
  
• Reproduces vegetatively
  
• Deliberately introduced by people (ornamental)

Low Risk Traits:

• No spines, thorns, or burrs
  
• No evidence of toxicity to humans or animals
  
• Long minimum generative time (4+ years, monocarpic)
  
• No adaptations for wind, water, animal external, or bird dispersal