Family: Asteraceae

Artemisia absinthium (wormwood, absinthe) is an herbaceous perennial native to northern Africa and the temperate portions of Europe and Asia.  It is commonly used in the alcoholic drinks absinthe and vermouth. Wormwood has been suggested to alleviate inflammation, enhance digestion, address skin infections, and eradicate parasites such as tapeworms. Nonetheless, the plant carries numerous toxic properties and can pose risks, particularly for pregnant women. Over consumption may lead to seizures and hallucinations. Despite these potential benefits and risks, there is insufficient evidence to support the use of wormwood for treating or preventing medical conditions. 

It is now naturalized across the northern United States and Canada but is not documented to be naturalized on any Hawaiian Islands to date. This plant is considered allergenic to some and is toxic if consumed in large quantities. It is an agricultural weed and can create dense stands in overgrazed pastures and disturbed habitats. Its prolific seed production, shade tolerance, and 4 year seed viability create cause for concern.

High Risk Traits:

• Broad climate suitability
  
• Able to grow and spread in regions with tropical climates
  
• Widely naturalized (although no evidence in the Hawaiian Islands to date)
  
• A disturbance weed that can negatively impact agriculture
  
• Other species are invasive
  
• Allergenic to people, and toxic if consumed in large quantities
  
• Shade tolerant
  
• Tolerates many soil types
  
• Forms dense stands in disturbed habitats or overgrazed pastures
  
• Reproduces by seeds
  
• Reaches maturity in 2 growing seasons
  
• Dispersed by wind, water and intentionally by people
  
• Prolific seed production
  
• Seeds can remain viable in the soil for up to 4 years

Low Risk Traits:

• Unarmed (no spines, thorns, or burrs)
  
• Palatable to some grazing animals (despite reports of possible toxicity)
  
• Herbicides may provide effective control
  
• Killed by fire