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Jack-in-the-Pulpit
Arisaema triphyllum
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.
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Rutgers New Jersey Agricultural Experiment Station
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New Jersey Agricultural Experiment Station · 88 Lipman Drive · New Brunswick, NJ 08901-8525
