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Poisonous Plants

Poisonous Plants
A Guide to Plants That Can Harm Your Pet

Listed below are the dangerous parts (in italics) of some plants and symptoms of ingestion.

Listing is alphabetical by common plant name.

Plant names and signs of poisoning:

  • Apple, Apricot, Cherry (Leaves, seeds & pits) -
    Apprehension, dilated pupils, hyper-ventilation, shock
  • Asparagus Fern (Entire plant) -
    Allergic dermatitis with repeated exposure, berries may cause vomiting
  • Azalea, Rhododendron (Entire plant) -
    Vomiting and diarrhea plus depression of central nervous system and cardiovascular collapse, hyper-salivation, weakness, coma, hypotension
  • Caladium, Diffenbachia, Dumb Cane, Elephant Ears (Entire plant) -
    Intense burning and irritation of mouth, tongue, and lips
  • Daffodil, Narcissus (Entire plant) -
    Gastrointestinal disorders, convulsions, shivering, hypotension, muscular tremors and cardiac arrhythmia
  • English Ivy (Entire plant)
    Gastrointestinal upset, diarrhea, hyper-activity, dyspnea and coma, hyper-salivation, fever, polydipsia, mydrisis, muscular weakness and ataxia
  • Foxglove (Entire plant)
    Cardiac arrhythmia, vomiting, diarrhea, weakness
  • Holly (Entire plant)
    Vomiting and diarrhea plus central nervous system depression
  • Lilly of the Valley (Entire plant)
    Ataxia, vomiting, cardiac arrhythmia
  • Mistletoe (Entire plant)
    Gastrointestinal disorders, cardiovascular collapse, dyspnea, bardycardia, erratic central nervous system behavior
  • Morning Glory (Seeds)
  • Oleander (Entire plant)
    Vomiting, diarrhea, abnormal pulse, pulse rate arrhythmia, decreased body temperature, oral irritation
  • Philodendron (Entire plant)
    Intense burning and irritation of the mouth, tongue, and lips
  • Poinsettia (Entire plant)
    Considered to be low in toxicity. May cause mild vomiting or nausea
  • Yew, Japanese Yew (Entire plant)
    Acute cardiac failure; early signs include muscular tremors, dyspnea
Below are less common household plants also considered toxic to small companion animals:

Aloe Vera, Amaryllis, Apple seeds, Andromeda, Apple Leaf Croton, Arrowgrass, Arrowhead, Autumn Crocus, Avocado

Begonia, Bittersweet, Black Locust, Bleeding Heart, Boston Ivy, Buttercup, Buddhist Pine, Bird-Of-Paradise, Branching Ivy, Buckeye

Calla Lilly, California Poppy, Carnation, Castor Bean, Ceriman, Charming Dieffenbachia, Chinese Evergreen, Chives, Chokecherry, Christmas Rose, Chrysanthemum, Clematis, Climbing Lily, Cineraria, Cordatum, Corn Plant, Cornstalk Plant, Cowslip, Crocus, Croton, Crown of Thorns, Crown Vetch, Cuban Laurel, Cutleaf Philodendron, Cycads, Cyclamen

Daphne, Datura, Delphinium, Devil's Ivy, Dicentra, Donkey Tail, Dracaena Palm, Dragon Tree, Dutchman's Breeches

Easter Lilly, Elderberry, Elaine Codiaeum, Emerald Feather, Eucalyptus, Exotica Perfection Dieffenbachia

Fiddle-leaf Fig, Fiddle-leaf, Florida Beauty, Four O'Clock, Foxtail Fruit Salad Plant

German Ivy, Giant Dumb Cane, Glacier Ivy, Gladiola, Gold Diffenbachia, Gold Dust Dracaena, Green Gold Nephthytis

Hanh's Self-Branching English Ivy, Heartleaf Philodendron, Hemlock, Honeysuckle, Horse-Chestnut, Horsehead Philodendron, Hurricane Plant, Hyacinth, Hydrangea

Indian Laurel, Indian Rubber Plant, Iris, Ivy

Jack-In-The-Pulpit, Janet Craig Dracaena, Jasmine, Jerusalem Cherry, Jimsonweed, Jonquil, Juniper


Laburnum, Lacy Tree Philodendron, Lamb's Quarter, Lantana, Larkspur, Laurel, Lily, Locoweed, Lobelia, Lords-and-Ladies, Lupine

Madagascar Dragon Tree, Marble Queen, Marigold, Marijuana, Mayapple, Medicine Plant, Milkweed, Miniature Croton, Mexican Breadfruit, Mock Orange, Monkshood, Mother-In-Law Tongue, Mountain Laurel, Mushrooms

Needlepoint Ivy, Nephthytis, Nightshade

Oak Tree (buds & acorns), Onion

Panda, Peace Lily, Peach pits, Pencil Cactus, Plumosa Fern, Poison Hemlock, Poison Ivy, Poison Oak, Poison Sumac, Pokeweed, Poppy, Potato Shoots, Pothos, Precatory Bean, Primula, Privet

Red Emerald, Red Princess, Red-Margined Dracaena, Rhubarb, Ribbon Plant, Ribbon Cactus, Rubber Tree, Rosary Pea

Saddle Leaf Philodendron, Sago Palm, Satin Pothos, Schefflera, Shamrock Plant, Shunk Cabbage, Silver Pathos, Snake Plant, Snowdrop, Snow On The Mountain, Sorghum, Star of Bethlehem, Stinging Nettle, Stinkweed, Swiss Cheese Plant

Taro Vine, Toadstools, Tobacco, Tomato Plant

Umbrella Tree

Water Hemlock, Weeping Fig, Wisteria

For more information about poisonous plants and other substances which are harmful, please contact your pet's veterinarian or a Michigan Humane Society veterinary center.

If you suspect your companion animal may have ingested a poisonous substance, you may wish to use a national animal poison control emergency service such as:
University of Illinois / ASPCA
National Animal Poison Control Center*
*These services will assess a consultation fee (payable by major credit card) for each case. They are not affiliated with the Michigan Humane Society.


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