Guide to Poisonous Plants
Poison Ivy
Poison Oak
Poison Sumac
Giant Hogweed
Stinging Nettle
Australian Stinging Tree
Wild Parsnip
Poison Hemlock
Foxglove
Bitter Nightshade
Jimsonweed
Mistletoe
Oleander
Azalea and Rhododendron
If You Suspect Poison
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SOURCES:
Cleveland Clinic: “Poison Plants: Poison Ivy, Poison Oak & Poison Sumac.”
Mayo Clinic Expert Answers: “Are poinsettia plants poisonous?”
National Capital Poison Center: “If You Suspect A Poisoning...Act Fast!” “Foxglove: Toxic to the Heart,” “Azaleas and Rhododendrons.”
Ohio State University Extension: “Giant Hogweed (Heracleum mantegazzianum).”
United States Department of Agriculture: “Poison Hemlock (Conium maculatum).”
University of Illinois Extension: “Plants That Cause Skin Irritation.”
Weed Society of America: “Mistletoe,” “Oleander,” “Jimsonweed, thornapple, datura,” “Bitter nightshade.”
University of Queensland: “Native stinging tree toxins match the pain of spiders and cone snails.”