Family: Cactaceae

Origin, Description & Uses
Pereskia grandifolia (rose cactus) is native to eastern and southern Brazil, where it grows as an unusual member of the cactus family that retains large, leafy foliage rather than the typical spine-reduced form seen in most cacti. It is a fast-growing, upright shrub or small tree that can reach several meters in height, with woody stems, broad green leaves, and clusters of showy pink to rose-colored flowers. Because of its attractive appearance and adaptability, it is commonly grown as an ornamental plant in tropical and subtropical gardens. In some regions, its young leaves and shoots are also used as a cooked green, and the plant can serve as a living fence or accent plant in landscapes.

Risks & Threats
This species is generally considered low risk, as it has not shown strong tendencies toward invasiveness or aggressive spread in most introduced regions. It is not known to form dense wild populations or displace native vegetation readily, particularly in managed landscapes. However, as with any widely cultivated ornamental plant, it should still be observed for signs of escape or naturalization in suitable climates, especially in disturbed habitats. Continued awareness and responsible planting practices are recommended to ensure it remains well-behaved and does not become problematic in Hawaiʻi’s sensitive ecosystems.

High Risk Traits:

• Congeneric weed – P. aculeata is a serious environmental weed.
  
• Spines/thorns – Thorny stem requires caution.
  
• Unpalatable to grazers – Used as livestock fence; potential threat to grazing.
  
• Forms dense thickets – Genus can form impenetrable thickets.
  
• Intentional dispersal – Grown as ornamental.
  
• Viable seed production – Propagates by seed or cuttings.
  
• Tropical/subtropical native – Naturalized throughout neotropics.
  
• Repeated introductions – Widely cultivated outside native range.

Low Risk Traits:

• No weediness (garden, agricultural, or environmental).
  
• Not toxic, allelopathic, parasitic, or a pest host.
  
• No fire hazard (fleshy, waxy leaves).
  
• Not shade tolerant – Requires sun.
  
• Narrow soil tolerance – Needs rich, well-drained soil
  
• Self-sterile – Rarely produces seed via self-pollination.
  
• Low seed production – Large seeds, not prolific.
  
• No wind, water, or external animal dispersal adaptations.
  
• Fruits too large for most birds (5–10 cm).