Jack-in-the-Pulpit

Arisaema triphyllum

Photo of Jack-in-the-Pulpit
Photo by Dr. John Meade, weed scientist emeritus
Rutgers Cooperative Extension

The rhizome (underground stem) of this plant which grows in wet woodland contains a compound which causes severe irritation and swelling in the mouth. The same compound is found in dumbcane and philodendron.

Additional Images


  1. Rutgers
  2. Executive Dean of Agriculture and Natural Resources
  3. School of Environmental and Biological Sciences