Family: Apocynaceae

Origin, Description & Uses:
Hoodia pilifera, commonly known as hoodia, is a succulent plant native to the arid regions of South Africa’s Cape Provinces. Adapted to dry, desert-like conditions, it features upright, spiny stems that resemble cacti, although it belongs to a different plant family. During its flowering period, it produces distinctive, star-shaped blooms that are often mottled and may emit a strong odor to attract pollinators such as flies. Like other hoodia species, H. pilifera has traditionally been used in its native range for its appetite-suppressing properties, and it has drawn interest for potential use in natural health products. It is also occasionally cultivated as an ornamental succulent in xeriscapes and specialty plant collections.

Risks & Threats:
Hoodia pilifera is considered a low-risk species for Hawaii. It has very specific growing requirements, favoring hot, dry environments with well-drained soils, which limits its ability to spread in wetter tropical ecosystems. There is no evidence that this species naturalizes or becomes invasive outside its native range. While it can be grown successfully in controlled garden settings, especially in dry or container conditions, it does not exhibit aggressive growth or reproductive traits that would threaten native ecosystems. As with many succulents, responsible cultivation and proper disposal of plant material are encouraged to prevent any unlikely spread.

High Risk Traits:

• Able to grow in regions with tropical climates
  
• Spiny
  
• Reproduces by wind-dispersed seeds
  
• May be able to produce interspecific and intergeneric hybrids
  
• Limited ecological information may reduce accuracy of risk prediction

Low Risk Traits:

• No reports of invasiveness or naturalization, but introduction outside native range appear to be limited
  
• Valuable medicinal plant
  
• Susceptibility to bacterial and fungal rot, mites and mite transmitted diseases may limit ability to escape and spread in the Hawaiian Islands
  
• Possibly self-incompatible
  
• Not reported to spread vegetatively