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Poisonous Plants
A plant is considered to be poisonous (TOXIC) if it causes chemical injury to a person who either touches or swallows it, or in very rare cases, breathes its scent.

If a poisoning occurs, act quickly! If the person is having trouble breathing, experiencing seizures, or will not wake up, CALL 911 (or your local emergency number) IMMEDIATELY! If the person is not experiencing those particular symptoms, call your local poison control center or family clinic immediately - BEFORE attempting to treat the poisoning yourself. If you are advised to seek medical attention for poisoning from a plant, try to bring in a piece of the plant, along with any other information you may have on the plant (name, any fertilizers or leaf cleaners used on the plant, etc.)

The following plants contain a wide variety of poisons. Symptoms may include a wide variety of symptoms including, but not limited to: mild stomach ache, skin rash, swelling of the mouth and throat; or they may be NO visible symptoms. It is safest to call your local poison control center or family clinic ANYTIME a plant is ingested.

This listing may not include all poisonous plants; if you are unsure if a plant is considered toxic, call your local poison control center to find out BEFORE you have an emergency with it.

Plants Considered Toxic to Humans
  • Acorn Anemone
  • Angel Trumpet Tree
  • Apple Seeds
  • Apricot Pit-Kernels
  • Arrowhead
  • Avocado-Leaves
  • Azaleas
  • Betel Nut Palm
  • Bittersweet
  • Buckeye
  • Buttercups
  • Caladium
  • Calla Lily
  • Castor Bean
  • Chinese Lantern
  • Creeping Charlie-Ground Ivy (glechoma hedercea)
  • Crocus, Autumn
  • Daffodil
  • Daphne
  • Delphinium
  • Devil's Ivy
  • Dieffenbachia (Dumb Cane)
  • Elderberry
  • Elephant Ear
  • English Ivy
  • Four O'Clock
  • Foxglove
  • Hemlock, Poison
  • Holly Berries
  • Horsetail Reed
  • Hyacinth (bulbs)
  • Hydrangea
  • Iris
  • Ivy (Boston, English)
  • Jack-In-The-Pulpit
  • Jequirity Bean or Pea
  • Jerusalem Cherry
  • Jessamine (Jasmine)
  • Jimson Weed (Thorn Apple)
  • Jonquil
  • Lantana Camara
  • Larkspur
  • Laurels
  • Lily-Of The-Valley
  • Lobelia
  • Marijuana
  • Mayapple
  • Mescal (Peyote)
  • Mistletoe
  • Moonseed
  • Monkshood
  • Morning Glory
  • Mushroom
  • Narcissus
  • Nephthytis
  • Nightshade
  • Oleander
  • Peach Seeds
  • Periwinkle
  • Philodendron
  • Poison Ivy
  • Poison Oak
  • Poppy (Calif. Poppy Excepted)
  • Pokeweed
  • Potato-Sprouts
  • Primrose
  • Ranunculus
  • Rhododendron
  • Rhubarb-Blade
  • Rosary Pea
  • Star-Of-Bethlehem
  • Sweet Pea
  • Tobacco
  • Tomato-Vines
  • Tulip
  • Water Hemlock
  • Wisteria
  • Yew


In addition, there are many plants wich are considered toxic to pets. Not all of the plants listed here are toxic to all animals, but this may be used as a very general guideline.

If you suspect that an animal has been poisoned by eating a plant, call your vet immediately! If it is after clicnic hours, there should be a recording with a number for emergency vet services. You could also call your local poison control center; they should have information pertaining to pets. Make this call BEFORE you attempt to treat the animal for poisoning. If you are advised to seek medical attention for your pet, try to bring in a piece of the plant, along with any other information you may have on the plant (name, any fertilizers or leaf cleaners used on the plant, etc.)

The following plants contain a wide variety of poisons. Some may be toxic to one type of animal, and not to another. They may produce a wide variety of symptoms may include a wide variety of symptoms including, but not limited to: skin rash, swelling of the mouth and throat, discoloration of the gumsor they may be NO visible symptoms. It is safest to call your vet or local poison control center ANYTIME a plant is ingested.

This listing may not include all poisonous plants; if you are unsure if a plant is considered toxic, call your local poison control center to find out BEFORE you have an emergency with it.

Plants Considered Toxic to Animals
  • Alfalfa
  • Bloodroot
  • Bouncing Bet
  • Bracken or Brake Fern
  • Buttercup
  • Castor Bean
  • Clover, Alsike & Other Clovers
  • Cocklebur
  • Crown of Thorns
  • Curly Dock
  • Daffodil
  • Delphinium
  • Dogbane
  • Dutchman's Breeches
  • Elderberry
  • English Ivy
  • Fireweed
  • Foxglove
  • Horse Chestnut, Buckeyes
  • Horsetails
  • Hyacinth
  • Hydrangea
  • Jack-in-the-Pulpit
  • Japanese Yew
  • Jerusalem Cherry
  • Jimson Weed
  • Kentucky Coffee Tree
  • Lamb's Quarters
  • Lantana
  • Lily-of-the-Valley
  • Lupine
  • Mayapple
  • Milkweed, Common
  • Nightshade
  • Oleander
  • Ohio Buckeye
  • Philodendron
  • Pigweed
  • Poison Hemlock
  • Poison Ivy
  • Poke
  • Purple Mint
  • Rhododendron
  • Rhubarb
  • St. Johnswort
  • Sudan Grass
  • Tulip
  • Water Hemlock
  • White Snakeroot
  • Wild Onion
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